Problem with SQL Server Managment Studio Express CTP

Hi, I have installed the product in subject but after installation if a click on program to use it, i have no result.

Someone can tell me how i can control why it no work?

The real problem is that it no give me an error code simply the program not start.?!?!?

Thank's for your attention.

By Fabrizio

I find...

When you downloaded the updated Management Studio Express, did you see it take some time to download it again, or did it start immediately? (If it starts immediately, you're running a cached copy of the Windows installer package for SSMSE.)

If you rename the "HKEY_LOCAL_MACHINE\Software\Microsoft\Microsoft SQL Server\90\Tools\Shell" registry key to "HKEY_LOCAL_MACHINE\Software\Microsoft\Microsoft SQL Server\90\Tools\ShellX" using regedit, SSMSE should start. This should not affect the stand-alone Books Online at all.

After you rename the registry key and then start Management Studio Express, does the splash Screen say "SQL Server Management Studio Express Edition" or just "Management Studio Express"? The November 11 download says "Management Studio Express."