SQL Server Management Studio connection fails to COM errors

I have an instance of SQL Server 2008 running on a Windows 2008 server. I am able to connect to this SQL server from several machines on my network. However, I cannot connect using SQL Management Studio on the SQL Server itself.

When I hit "Connect" I get this error:

Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.VisualStudio.OLE.Interop.IServiceProvider'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{6D5140C1-7436-11CE-8034-00AA006009FA}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). (Microsoft.VisualStudio.OLE.Interop)

Server config:

• SQL Server 2005
• Windows Server 2008 Std 32-bit
• Also runs SQL Server 2000 on port 1444

I tried:

• Uninstalling and reinstalling SQL Management Studio
• Adding these registry entries
• Rebooting
• Running these commands:

for %1 in (%windir%\system32*.dll) do regsvr32 /s %1

for %1 in (%windir%\system32*.ocx) do regsvr32 /s %1

• Running regsvr32 actxprxy.dll, which produced an error

Any ideas?

Justin

unregister actxprxy.dll then reregister it

run

regsvr32.exe –r c:\windows\system32\actxprxy.dll
regsvr32.exe c:\windows\system32\actxprxy.dll

run these in a command prompt as administrator

On Windows2008 server, the command for unregister is:

 regsvr32.exe /u c:\windows\system32\actxprxy.dll