I'm getting black and white output,everything else is fine

Hi,
I'm using Avermedia Avertv Go tv tuner card. I was using Windows and i recently switched to Ubuntu. So I looked up the links tvtime.net and http://pikupq.wordpress.com/2008/06/12/configure-avermedia-aver-tv-go-007-configuration-in-ubuntu, to configure my card to run in Ubuntu. But when I used the commands dmesg or lspci or lshw, it gave me that my driver was "bttv". So I configured the tvtime that way, for example I ran the modprobe command with bttv as the argument.

Now, the problem is : I'm getting output video in black and white. Everything else is fine only the video is black and white! It's like I'm watching tv in the 80's!!

And here is the output of tvtime at the terminal(I ran it in the verbose mode) :
root@x89:/etc# tvtime -v
Running tvtime 1.0.2.
Reading configuration from /etc/tvtime/tvtime.xml
Reading configuration from /home/ecthiender/.tvtime/tvtime.xml
cpuinfo: CPU AMD Athlon(tm) 64 X2 Dual Core Processor 4000+, family 15, model 11, stepping 1.
cpuinfo: CPU measured at 1001.892MHz.
xcommon: Display :0.0, vendor The X.Org Foundation, vendor release 10600000
xfullscreen: Using XINERAMA for dual-head information.
xfullscreen: Pixels are square.
xfullscreen: Number of displays is 1.
xfullscreen: Head 0 at 0,0 with size 1280x800.
xcommon: Have XTest, will use it to ping the screensaver.
xcommon: Pixel aspect ratio 1:1.
xcommon: Pixel aspect ratio 1:1.
xcommon: Window manager is compiz and is EWMH compliant.
xcommon: Using EWMH state fullscreen property.
xcommon: Using EWMH state above property.
xcommon: Using EWMH state below property.
xcommon: Pixel aspect ratio 1:1.
xcommon: Displaying in a 768x576 window inside 768x576 space.
xvoutput: Using XVIDEO adaptor 57: Radeon Textured Video.
speedycode: Using MMXEXT optimized functions.
station: Reading stationlist from /home/ecthiender/.tvtime/stationlist.xml
videoinput: Using video4linux2 driver 'bttv', card 'BT878 video ( *** UNKNOWN/GENER' (bus PCI:0000:02:06.0).
videoinput: Version is 2321, capabilities 5010015.
videoinput: Width 768 too high, using 744 instead as suggested by the driver.
videoinput: Maximum input width: 744 pixels.
tvtime: Sampling input at 744 pixels per scanline.
xcommon: Pixel aspect ratio 1:1.
xcommon: Displaying in a 768x576 window inside 768x576 space.
xcommon: Received a map, marking window as visible (70).
tvtime: Cleaning up.
Thank you for using tvtime.

Oh and one more thing, I'm using digital home service(through set-top box you know), so I have the video source as composite and not tv signal.

I need help badly...
Thanks in advance

Ray