I download two examples form http://forum.nokia.com/main/0,,1_32_30,00.html

One is Video.SIS , the other is VRex.SIS.

These two files is contained by the two example.

I install these two file at Nokia 7100(Series 60)
When I use Video, no video files can be played, even .3pg.
When I use VRex, Only .3pg file can be played, but other mpeg-4 files(such as .avi)can not be played.

Then I install XVid(a mpeg-4 decodec) in my mobiles, but there are some problems.

Why ?

And how can I play a .avi ?