DVD Drive problems

Hi all,

Using Vista Ultimate. The problem is with DVD's. Movie DVD's play great,
Music CD's, Game CD's etc all play and work normally. The problem is with
DVD Games. Now the games are fine as I tried them on another System, all
worked great. I tried the drive itself in another system, all works great.

The problem is Game DVD's, I put the DVD in, Drive light goes on for about
5-6 seconds, then goes out ...... nothing .... even in "computer" the drive
is showing but whenever you try and access the DVD (as it wont auto run)
The drive opens and windows says to insert a disc .... grrrr.

Any ideas at to why? and better still how to fix it!

Big thanks