Have you checked here for the latest drivers?
How to use Skype 3.8 with Skype phone and Windows 7?
I have an xact XVP620 telephone set which works only on Skype 3.8, I have downloaded and working on Windows 7, I couldn't find the compatible download for my Skype 3.8. Can anyone help either to upgrade the phone set (XVP620) to be compatible with Windows 7 or vice versa.
Windows for home | Previous Windows versions | Apps
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Answer accepted by question author
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Anonymous
2011-07-17T07:41:00+00:00
Answer accepted by question author
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Anonymous
2011-07-17T06:37:03+00:00 Hi M. Ghandour,
I would suggest you to install the Skype in compatible mode. The following link will help you to install in compatible mode.
Make older programs run in this version of Windows
http://windows.microsoft.com/en-us/windows7/Make-older-programs-run-in-this-version-of-Windows
If the above steps fail, I would suggest you to post your question in the Skype forums.