Nero will not burn Data CD

I am at a loss. No matter what speed I write at or what media I use I keep getting errors when trying to burn CDs. I have an Artec WRR-4848 CDR. I get messages like Error medium speed, burn process failed, or it hangs up with no explaination at all. I am using the burner on a Windows 2000 server. I have changed media, write speeds, multisession, finalize cd, JustLink on and off, every setting I can find to change with no results. I am just before calling my vendor and making him replace all the burners.

Neither Nero or Artec have responded to my e-mails, support requests, or calls. If anyone can help I would really appreciate it!

:confused: Desiree