If you're using Nero, go into "Recorder -> Choose Recorder", highlight your Buslink, press "Options" and uncheck the "JustSpeed enabled".
JustSpeed is the drive's internal media check system. The drive has a database of media types it can write to at the various speeds. But if you have a disc you know is capable of being written to at 32x, switch JustSpeed off then the drive will allow writing of the disc up to 52x.
You'll have to be careful and make sure the discs coming out of the machine are written properly (use NeroCDSpeed's "Scandisc" function for that) but in most cases good quality 32x media will write OK at 32x, and often 40x or even 48x (52x is unlikely but possible).
The irony is that the cheaper, "crappy" Verbatim Datalife (not Plus) media will more than likely write at 52x on this drive!!!