Uninstall the Scopia Desktop software and Outlook plug-in from the Control Panel of the computer.
Start Menu > Settings > Control Panel > Add or Remove Programs >
Select RADVISION Conference Client and RADVISION SCOPIA Add-in for Microsoft Office Outlook.
After removed, reboot the computer.
Go to scopia.avaya.com website and click on the 'update' link in the upper right-hand corner of the Scopia Desktop screen.
Select RUN to run the Conference Client and the Microsoft Office Outlook Plug-In. After the applications are loaded, try to start the conference again from the Outlook plug-in to confirm it is all working correctly.