Launch.rtc file association and Windows 7

I have had 2 customers of mine now report not being able to get into my LiveMeeting sessions (via this link https://www.livemeeting.com/cc/topechelon/join?id=BBKE&role=attend ).
I remotely connect to their machine, and see that that are using Windows 7. When they click the link, it prompts them to Open or Save launch.rtc, and when you click Open it starts to open the file with something like Adobe Reader.
So I go to the Default Programs for file assocations... there is an entry for .rtc-ms that has the LiveMeeting icon associated with it. But right above it is .rtc and it show the "unknown" icon (as in it doesn't know what program to use for .rtc)
Again, two customers at different locations... both using Windows 7 and both trying to get into the same meeting.
Please help...

Hello all, this seems to be an unanswered question that has stumped a lot of people. Hopefully this will help solve the issue for others. It worked for me.
Browse to
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rtc and delete the
“.rtc” key
Browse to
HKEY_CLASSES_ROOT\.rtc and delete “.rtc” key
Go to Control Panel and open
Programs and Features
Repair
the
Microsoft Office Live Meeting 2007 install
Go to Control Panel and open
Default Programs
Select the second item “Associate a file type or protocol with a program”
Scroll to
“.rtc” and confirm that the Live Meeting Icon is present (orange color indicating that it is associated with the rtcrouter.dll file) and the
Current Default is pointing to “Microsoft Office Live Meeting Router”
Joe G

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