the remote work fine except for one thing, I cant get it to turn my pc on???

in the manual of the tv tuner, it says to enable (wol) in bios to be able to turn my pc on with the media centre remote. (it turns it off and all buttons work in vista mediacentre)
im using vista 64bit, and a BFG 680i board (i have enabled wol in bios) still wont work???
how can i get it to work?..any suggestions?