Philips CDRW2412 Speed Problem

[SemiDiablan]

I was wondering if anyone could help me out with my problem. I bought the Philips CRW2412 at the end of 2002 and it worked great. However, about a month or two after I got it it would only allow me to burn at 16X instead of the max of 24X. Even when I right click the drive>Properties>Recording tab the drop down menue for writing speed only goes up to 16X when it used to go up to 24X.

Any help?

Thank you.