Naruto 6 no vid?

im not sure why this would be a problem but ha ha.... I started collecting naruto just recently, the batches of 9 and its kind of interesting. got to ep 6 and find that i cannot get video for some reason. im running the latest version of divx and xvid and it works for everything else. my other naruto works fine, but ep 6 seems buggered O_o.
anyone know what codec i might need? otherwise, what happens in 6 ^^;;? im thinking it might be faster for somone to just tell me what happened. then i wont have to bugger my codec install, just watch 7+ ^^;;