LG RC7723W - I can't play some DivX movies

I have an LG RC7723W and it works quite well. I am having problems, however, playing some DivX video. Is there a firmware update that will fix the problem or is there something else that I have to do.

Thanks in advance

Norman

What kind of problems?

Basically, the DivX files are not recognised. Some DivX’s are fine but I just can’t see others at all.