Wyse T50 Addons Installation issue.

I have downloaded Wyse T50 addons from wyse.com , I have tried the procedure mention in Admin guide and Ref INI guide to add addons from FTP, but cannot get addons to add in T50. I even tried from Confgen 6.2 but no success .
Please suggest me the correct procedure . my INI look like this:
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Update.Mode=Addons
Install=wyse-ec
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I have also tried installing single addon with the name vworkspace****.deb package by moving the file to T50 and installing it via Terminal(command prompt) , Installation end with failure.