Video Toaster 4000 prob

[Quagmire]

I've just installed a VT4000 in my A4000 (jumpered to NTSC) installed software version 4.1 ok but when I load the Toaster software I get as far as the main switcher screen and the A4000 reboots, I do get the toaster display from the preview output on the VT4000 card.

My system is

A4000 Cyberstorm mk3 060 w128MB RAM
KS 3.0
WB 3.1


Any ideas anyone?

thanks

[Quagmire]

It's 4.1D, it reboots if I run Autohue too