ok 2nd time typeing this! (short version)

ive been getting red/blue/green dots in my divx/xvid movies basicly after 4-5 formats ive isolated the problem now ive just installed the xvid codec (XviD Koepi 24062003-1) this for some reason allowed me to play both divx and xvid

later i had to install a ac3 filter (AC3Filter 0.70b) this made the dots showing in my xvid much worse (1-2 -> 10-20) but made no inpack on my divx movie....

i know what im doing (converting wise) and ive been round pc's since 286's so this isnt new to me... i just dont know what to do next!!!

any help is apricated!

M.e.D.