[solved] Producer 7 crashes when looping

I'm running this on a fresh install of Windows XP, fresh install of MVP7. No apps running in background other than standard Windows processes.
This is connected to a Firewire Mark of the Unicorn Ultralite. The Vestax VCI-100 is also connected.
When I click the loops (to loop a section in progressively smaller beats) MV eventually crashes. The program just closes. I am simply clicking on the loop points with the mouse in standard and smart looping mode.
I have tried this with and without the VCI hooked up and can recreate the problem every time.
Any ideas?
This is connected to a Firewire Mark of the Unicorn Ultralite. The Vestax VCI-100 is also connected.
When I click the loops (to loop a section in progressively smaller beats) MV eventually crashes. The program just closes. I am simply clicking on the loop points with the mouse in standard and smart looping mode.
I have tried this with and without the VCI hooked up and can recreate the problem every time.
Any ideas?