Help! Problems with reading CD's

Hey, can some one please help me :bow: I am having trouble playing most of the cd’s that have been burnt for me by friends. My optical drive is a SlimtypeDVDRW SOSW-8526 and I use WindowsXP.

It seems to me that the computer doesn’t recognise that there is a cd in the drive. At first, I thought that there may be problems due to scratching etc (ie the fault was in the disc), but I have found that it is doing this even to newly burnt discs (even those from my own computer).

Is there a setting that I can change, or something else that can be corrected. Please help, as I am at my wits end. :doh:

Thanks
itwannab