The error “The Remote Desktop Services ActiveX Client is not turned on” appears when you try to connect to a computer from Remote Web Access
You may encounter this error if you sign in to Remote Web Access from a computer that is running Windows XP with Service Pack 3 (SP3) and either Internet Explorer 7 or Internet Explorer 8 installed. When you click the help link, the Enable Remote Desktop Services ActiveX Client option is not available.
To work around this issue
1.From the computer that is running Windows XP SP3, open Registry Editor. To open Registry Editor, click Start, click Run, type regedit, and then click OK.
Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer.
2.Create the following registry key:
3.Open Internet Explorer.
4.On the menu bar, click Tools, click Manage Add-on, and then enable Remote Desktop Services ActiveX Client.