Keeps crashing everytime but it will nest fine. not sure what should be done, any ideas? I've already uninstalled QT, and re-installed, am in the process of Un-installing Vegas, and re-installing. Never really run into this before, but I know other folks have on occasion. (not necessarily this exact problem). and now I can't seem to register my re-install of vegas. Input would be appreciated

(a re-boot took care of the serial number registration not being available)

Sony Vegas 7.0
Version 7.0d (Build 192)
Exception 0xC0000005 (access violation) READ:0x4 IP:0x10179BC7
In Module 'QuickTime.qts' at Address 0x10110000 + 0x69BC7
Thread: VideoCache ID=0x1614 Stack=0x345F000-0x3460000
Registers:
EAX=00000004 CS=001b EIP=10179bc7 EFLGS=00010202
EBX=02891e18 SS=0023 ESP=0345f978 EBP=0345f980
ECX=00000000 DS=0023 ESI=0345f9f4 FS=003b
EDX=00000014 ES=0023 EDI=0345f99c GS=0000
Bytes at CS:EIP:
10179BC7: 8B 00 0B C0 75 05 E8 7E ....u..~
10179BCF: 6B FE FF 89 45 FC 8B 75 k...E..u