Hi, thank you for your answer.
I tried to install digRotate 4.0.13 module on a new server, but the problem is not solved. I add an attachment to this reply (admin.jpg): it shows that color option are not visible.

In the Event log I don't see anything related to DNN. The version of DNN installed is the last 4.x released: on dotnetnuke.com they say 4.9.5, but in my installation (from Host Settings) I see 04.09.05 (.NET Framework: 2.0.50727.3603)
These are the logs after installing the module:
-------------------------------------------------------------------------------------------------
StartJob Starting Installation
StartJob Reading files
Info Loading DataHandler.ashx
Info File DataHandler.ashx read successfully
Info Loading ImageHandler.ashx
Info File ImageHandler.ashx read successfully
Info Loading Admin.ascx
Info File Admin.ascx read successfully
Info Loading LicenseInfo.ascx
Info File LicenseInfo.ascx read successfully
Info Loading Rotate.ascx
Info File Rotate.ascx read successfully
Info Loading RotateEdit.ascx
Info File RotateEdit.ascx read successfully
Info Loading DigRotate.dnn
Info File DigRotate.dnn read successfully
Info Loading Resources.zip
Info File Resources.zip read successfully
Info Loading 01.00.00.SqlDataProvider
Info File 01.00.00.SqlDataProvider read successfully
Info Loading 02.00.00.SqlDataProvider
Info File 02.00.00.SqlDataProvider read successfully
Info Loading 02.02.00.SqlDataProvider
Info File 02.02.00.SqlDataProvider read successfully
Info Loading 03.00.00.SqlDataProvider
Info File 03.00.00.SqlDataProvider read successfully
Info Loading 03.03.00.SqlDataProvider
Info File 03.03.00.SqlDataProvider read successfully
Info Loading 04.00.00.SqlDataProvider
Info File 04.00.00.SqlDataProvider read successfully
Info Loading 04.00.09.SqlDataProvider
Info File 04.00.09.SqlDataProvider read successfully
Info Loading Uninstall.SqlDataProvider
Info File Uninstall.SqlDataProvider read successfully
Info Loading module.css
Info File module.css read successfully
Info Loading digrotate.js
Info File digrotate.js read successfully
Info Loading DigNuke.License.dll
Info File DigNuke.License.dll read successfully
Info Loading DigRotate.swf
Info File DigRotate.swf read successfully
Info Loading DigNuke.DNN.Modules.DigRotate.dll
Info File DigNuke.DNN.Modules.DigRotate.dll read successfully
Info Loading XcessColorPicker.dll
Info File XcessColorPicker.dll read successfully
Info Loading Argotic.Common.dll
Info File Argotic.Common.dll read successfully
Info Loading Argotic.Core.dll
Info File Argotic.Core.dll read successfully
Info Loading Argotic.Extensions.dll
Info File Argotic.Extensions.dll read successfully
Info Loading Argotic.Web.dll
Info File Argotic.Web.dll read successfully
EndJob Reading files done.
StartJob Reading Installation Manifest file
Info DNN file is in valid 3.0 format.
Info xml loaded.
Info Loading files info
Info Loading Modules info
Info Loading Control info for 'DigRotate' module
EndJob Manifest file finished successfully
StartJob Begin Sql execution
Info Executing 01.00.00.SqlDataProvider
StartJob Start Sql execution: 01.00.00.SqlDataProvider file
EndJob End Sql execution: 01.00.00.SqlDataProvider file
Info Executing 02.00.00.SqlDataProvider
StartJob Start Sql execution: 02.00.00.SqlDataProvider file
EndJob End Sql execution: 02.00.00.SqlDataProvider file
Info Executing 02.02.00.SqlDataProvider
StartJob Start Sql execution: 02.02.00.SqlDataProvider file
EndJob End Sql execution: 02.02.00.SqlDataProvider file
Info Executing 03.00.00.SqlDataProvider
StartJob Start Sql execution: 03.00.00.SqlDataProvider file
EndJob End Sql execution: 03.00.00.SqlDataProvider file
Info Executing 03.03.00.SqlDataProvider
StartJob Start Sql execution: 03.03.00.SqlDataProvider file
EndJob End Sql execution: 03.03.00.SqlDataProvider file
Info Executing 04.00.00.SqlDataProvider
StartJob Start Sql execution: 04.00.00.SqlDataProvider file
EndJob End Sql execution: 04.00.00.SqlDataProvider file
Info Executing 04.00.09.SqlDataProvider
StartJob Start Sql execution: 04.00.09.SqlDataProvider file
EndJob End Sql execution: 04.00.09.SqlDataProvider file
EndJob Finished Sql execution
StartJob Creating files
StartJob Expanding Resource file
EndJob Resource Files created
Info Created [path]\portal\Website2\bin\DigNuke.DNN.Modules.DigRotate.dll
Info Created [path]\portal\Website2\bin\DigNuke.License.dll
Info Created [path]\portal\Website2\bin\XcessColorPicker.dll
Info Created [path]\portal\Website2\bin\Argotic.Common.dll
Info Created [path]\portal\Website2\bin\Argotic.Core.dll
Info Created [path]\portal\Website2\bin\Argotic.Extensions.dll
Info Created [path]\portal\Website2\bin\Argotic.Web.dll
Info Created [path]\portal\Website2\DesktopModules\DigRotate\ImageHandler.ashx
Info Created [path]\portal\Website2\DesktopModules\DigRotate\DataHandler.ashx
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Admin.ascx
Info Created [path]\portal\Website2\DesktopModules\DigRotate\digrotate.js
Info Created [path]\portal\Website2\DesktopModules\DigRotate\DigRotate.swf
Info Created [path]\portal\Website2\DesktopModules\DigRotate\module.css
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Rotate.ascx
Info Created [path]\portal\Website2\DesktopModules\DigRotate\RotateEdit.ascx
Info Created [path]\portal\Website2\DesktopModules\DigRotate\LicenseInfo.ascx
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\01.00.00.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\02.00.00.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\02.02.00.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\03.00.00.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\03.03.00.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\04.00.00.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Providers\DataProviders\SqlDataProvider\04.00.09.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\Uninstall.SqlDataProvider
Info Created [path]\portal\Website2\DesktopModules\DigRotate\DigRotate.dnn.config
EndJob Files created
StartJob Registering DesktopModule
Info Registering Definitions
Info Registering Controls
EndJob Registering finished
EndJob Installation successful
--------------------------------------------------------------------------------------------
Thank you very much for your help!