I am having the same problem with the EXACT same error.
I ran the test, and I have posted below the exact report, unedited.
I put it all on, knowing that my name and serial number is not included.
Any advice anyone has would be great.
Nero CD Speed Test results
Operating System Windows XP Professional
Drive IOMEGA ZIPCD 650 USB
Firmware Version I1.1
Serial Number ?
Time Elapsed Action
[21:44:13] Starting Write Transfer Rate Test
[21:44:18] Error - PARAMETER LIST LENGTH ERROR (051A00)