Video from PC to 360. Help!

I'm having trouble streaming videos from my PC to my Xbox. I can connect them together and i can listen to music from my PC on my xbox. But no video. Can someone help? Maybe it has to be in a specific fomat?

Thanks

it hAs to be wmv,mp4, or divx.

here use this, it's what i use to convert.

and also in My Documents/My Videos folder in case they weren't already

Okay, Great! Whatabout if i use a USB memory stick. Can i put video on that and use it on the 360?declasse