something wron with flv converting

hi i just downloaded a flv video and i tried to convert it but it won't convert saying i need codecs. i already installed the full k-lite codec package which inclueds FDD Show but still won't convert.HELP MEEEEEEEEEE!!!!!!!

Download a converting program?
The best one is Super http://www.erightsoft.com/SUPER.html it's freeware too.