Friggan weird burner problem...

[Dantey]

i have a liteon 48x24x48 burner..
using the latest nero version..
been burning for like 3 months fine on 48x speed..
then for some reason i was burning a cd and it only said 40x write.. so i thought must of been the cd's or something.. few days later i find the 50 cd spindle i bought was 48x compatible..
weird i thought...
now its only burning at 32x..
seems to be going slower and slower over time and im not doing anything? weird? :/
any suggestions..

im using a daemon tools virtual drive on I:
and the burner is G:
(no H: drive.. weird as well)
its windows 2000
amd 2400+