Help: no colour with Dazzle DVC 80 (USB analog video capture)

[SteveR]

I've just bought a Dazzle Digital Video Creator (DVC) 80 USB video
capture device. The installation was (almost) effortless, aside from a
single over-terse error message at boot-time caused by incorrect editing
of autoexec.bat by the MGI VideoWave installation program.

The problem that I'm having is that I cannot capture *colour* from my
VCR. I have a SCART-to-composite cable (SCART one end, red-white-yellow
phono plugs on the other) to connect to the VCR (Thomson multi-standard
capable, playing PAL tapes). The images show up just fine in the
preview window and in the captured (raw/uncompressed) AVI file, aside
from the fact that there's no colour. The tapes play OK onto my
television. It's not strictly correct to say that there's *no* colour,
but the faint green/red stripes over the image aren't right.

If I set the capture drivers to use NTSC mode, I get red/blue shadows
instead of green/red stripes, but no colour apart from that. Using
SECAM is a complete disaster.

OS: Windows 98SE
Machine: K6-2/500 on Gigabyte GA-5AX motherboard.
RAM: 320Mb
HD: Maxtor 13.6Gb (5400rpm UDMA66) C: / Quantum 3.2Gb DMA2 D:
Sound: Creative SB16 ISA PnP
Modem: Dynamode 56K ISA PnP
Ethernet: Netgear FA310TX (10/100Mb, PCI)
Misc: Pioneer DVD-ROM (10x, Tray, UDMA33)
HP Colorado Travan 4/8Gb ATAPI tape drive
HP Scanjet 5100C
OKI OL400ex printer
Wacom Ultrapad A5 (COM2)

Any ideas?

Thanks,
--
SteveR