QTP hangs when opening test

[Rich]

Have had this problem for the last two days..
Don't have the xml files

go to C:\Documents and Settings\Administrator\Application Data\HP\QuickTest Professional
copy all xml files from there and paste at your user application data folder
C:\Documents and Settings\<Your user>\Application Data\HP\QuickTest Professional

Also looked under :
C:\Documents and Settings\Administrator\Local Settings\Application Data....

Have also been to HP Support to ask for suggestions.
I just find it strange that the other tests all open and work fine.
any other suggestions would be appreciated.
Thanks.