Hi, everyone. I hope i write this mail in the right channel

I have Toshiba Satellite 1800 with PIII 800 with DVD Teac DV-28E-A.
Here is the story, At first my DVD can play everything but after I installed an adsl program (CD Rom) i cant play DVD anymore but still can play CD-ROM after sometime my DVD-Rom cant read anything except my only Game which is always being put inside. So its very funny, nothing cant be read except that cd game (AOE game).
I hope someone cant give me advise/suggestion.