minxy, Couple of things that might help you. Version 4.0m is a bit buggy if your player is 1.5 LCD I suggest you use version 3.68. If your LCD is 1.8 try using version 3.57. I posted how to set 3.57 for 160x120
HERE
You could still be having a codec problem as well try installing the K-Lite Mega Codec Pack, a Google search will find it for you.
Hope this helps, let us know if you are still having problems.