Help with Media Player..<<<Please>>>

Hi
I'm using VB6(sp5) on a p4, !.8ghz with WinXP Pro. I placed Windows Media Player on a form and used a command button to load the file (MediaPlayer1.FileName=(App.Path & "\Media.avi"))
It ran great on my machine but when I loaded it into Win98 it just crapped out. The media file played but the graphics were out of sync with the audio. I loaded the same media file into the Win98 media player and it ran just fine.
What gives?

Also:

What is the proper way to enter the beginning and ending values
to: MediaPlayer1.FileStart and MediaPlayer1.FileEnd. I tried

Code:

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MediaPlayer1.FileStart = (0)
MediaPlayer1.FileEnd = (5560)

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This is in Milliseconds and it didn't make any difference. I'm new to to programming so any help would be greatly appreciated.
Thanks..Ron L