G3 freezes when printing from Netscape

On a blue 400 mhz G3, I have an HP deskwriter 600 printer connected via a Keyspan USB serial adapter (my modem is connected to this adapter also). Everything was going well until I downloaded RealAudio off the net. Now when I try to print a webpage from Netscape, I get the "spooling to disk" message but the whole thing just locks up and I have to hit the reset button to get out of the frozen state. I have attempted to trash all of the RealAudio stuff, but the freezes continue. Any suggestions? Thanks...