In addition it is worth checking that the Preview File space is set to your dedicated video drive (if you are using one). To do this
File > Preferences > General Tab > Uncheck box 1 > Check box 2 and set folders to your second drive > Change Hard Disk to your second drive > uncheck the 'Limit Hard Disk usage to' check box > Click OK
I don't think the MSP 7 upgrade will solve the problem. Like the other contributors I suspect a set up problem. Do bear in mind though that MSP7 offers many other functional and Codec advantages. Try the trial from the ULead WebSite.
Good to see you posting again Jurgen. Hope that helps.
COMPAQ something or other with 500Gb Boot Disk, 1Tb external Firewire Disk, 4Gb Memory and a super duper sound card, 19" TFT Monitor etc etc etc
Sony TRV33e : Sony TRV310e : Canon XM2
Sony Vegas Studio editions to v11
Remember, there is always more to learn than there is to teach.