Help - problem with running SQL Server Management Studio Express CTP

I just installed SQL Server Management Studio Express CTP on a new XP Pro machine. SSMSECTP is present in the program list but nothing happens when I select it. What do I do to fix this? I don't have any type of interface to the SQL Server databases, although the Configuration Manager works OK.Problem solved - I uninstalled everything except MS .NET Framework 2.0 and then reinstalled everything. After this SSMSECTP came up OK.