This problem seems to be related to USB printers and print queue issues are very common in Mac OS computers and Windows 2000 PCs.
You don't say if you are using a USB connector, but they're pretty common these days. You also don't say if you're using a Mac or PC, but most people use PCs. I did find a solution for this issue that says it's related to Windows 2000 and a USB printer, but may apply to other operating system platforms:
Print Jobs are Stuck in the Print Queue
The first step to this solution is to download and install an HP diagnostic software utility. There's a separate page at HP that describes the utility and lets you download it:
HP Printing and Diagnostic Utility
I didn't find any information that specifically said that you "can" print a test page but "can't" print a document.
Another reason why you might be able to print a test page but not a document isn't related to the printer but the application that created the document. If you are having trouble with Word or Excel or whatever office application you used to create the doc, it might not print. That's why it is helpful to try to print a variety of different docs, created with different apps.
It could also be the individual document. Occasionally, a document becomes corrupted and while you may be able to open it (and sometimes you can't do even that), it doesn't print. If you haven't tried printing more than one document, you can test this by creating another doc in the same app and seeing if it'll print.
Try doing test prints with different docs and then with docs created in different apps. If those work, it's doc/app related. If they don't, try the links I suggested above.