After a new setup of the whole system VFP9 chrashs while accessing SourceGear Vault. I tried many ways without success.
To call SourceGear Vault in its own IDE works well but joining the Source Control from VFP doesn't.

A full installation of the system (Windows XP Pro SP2 with nearly all Updates) doesn't work
A low level installation (Windows XP SP1 with nearly no Updates) doesn't work

VFP9 SP1 doesn't work, SP2-Beta doesn't work.
To add more RAM doesn't work.
Installation on another computer (Windows XP Tablet SP2) doesn't work.
Vault Client 3.07, 3.1.2, 3.1.9 don't work.
.net-Framework 2.0, 3.0 don't work.

ERROR MESSAGES:

When calling "Join Source Control Project"
no Dialog appears but immediatly "Microsoft Visual FoxPro hat ein Problem festgestellt und muss beendet werden."
when clicking "Nicht berichten" (no report) appears "Fatal Error: Exception code=C0000005 @ 15:15:00. Error log file: C:\Programme\Microsoft Visual FoxPro 9\vfp9err.log"
when clicking "OK" appears sometimes "Die Anweisung in "0x5b0f1531" verweist auf Speicher in "0x00000014". Der Vorgang "read" konnte nicht auf dem Speicher ausgeführt werden. Klicken Sie auf "OK", um das Programm zu beenden." (The application in "0x5b0f1531" directs to memory in "0x00000014". The Process "read" couldn't be executed on the memory. Click on "OK" to quit the program.)
Then VFP disappeard totally.

Siegfried Keim