Q: I get big blocks in my video which have information for the previous frames.

A: This is an indication that your disk speed is not fast enough. If you are using an EIDE RAID make sure DMA is turned on in the System Properties in the Control Panel.

From the Control Panel:

Double click on the System icon
Select the Device Manager tab
Select Disk Drives
Select your video hard drive
Select the Settings tab
Turn on DMA
Restart Windows

You may also check to se if your disk is fragmented or malfunctioning. If you are using a SCSI device make sure it is terminated correctly.