new to xbox
 

modded xbox but on some backups get the message dirty disc or damaged disc is it the chip or the disc

dude
it may be the discs which ones do you use.
i used to use bulkpaq gen4 these were good. but tried traxdata again ( first try of these discs 6 months ago resulted in 14 coasters) the new batch i received are perfect and i have had no problems at all. they are quite cheap too cost me approx 33 quid for a pack of 25 including delivery charges.
try www.bigpockets.co.uk

I had same problem. use neo disks now and get 100% good burns every time. Only £19 for 25

Here's the site to the neos. I also recommend them.
http://www.xboxmods.com/products.php#neopremium
Don't use the purple top ones. Get the other ones above it.

:) thanx for the help
ps my xbox does play cd-r music