When you start the Remote Desktop Web Connection window after installing Windows XP Service Pack 3, the following error may occur, and the Connect button remains grayed out:
Microsoft RDP ActiveX Control is disabled when you install Windows XP Service Pack 3 or Windows Small Business Server 2003 SP1. Follow one of the following methods to enable the ActiveX control.
Method 1
Use the Manage Add-ons dialog in Internet Explorer to enable the Terminal Services ActiveX Control. For more information, refer to article You cannot connect to a remote computer when you use Terminal Services Web Access or Remote Web Workspace on a Windows XP SP3-based computer
If the ActiveX control is not listed in Manage Add-ons dialog, follow Method 2 below.
Method 2
1. Click Start, Run. Type Regedit.exe and press ENTER
2. Navigate to the following branch:
3. Double-click Settings to expand the branch
4. Right-click {7584c670-2274-4efb-b00b-d6aaba6d3850} and choose Delete
5. Click Yes when asked for confirmation.
Close all instances of Internet Explorer and re-run Remote Desktop Web Connection.
Registry Fix
To automate the above, download tsweb-enable.zip and save to Desktop. Extract the contents and run the file tsweb-enable.reg file. To reverse the changes, run tsweb-disable.reg.
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