weird windows activity

[omarello]

hello all,

i am having this weird problem. my computer suddenly stopped recognizing my cd drive and my cd burner, i have an exclamation mark beside them in the device manager and i can't access them any more form windows.

but if i boot up from the windows XP cd and try to repair windows i go to a sorta dos mode and i can access the deives from there...

how is it possible for me to solve this problem i tried reinstalling the drivers and shit but still it is not working....

any clue on how to fix this problem

thanx