1320c printer networking problems

Help!!  I have a the following set up - ADSL modem connected to belkin wireless router with laptops connected wirelessly and desktop pc and 1320c printer connected by cables.  Printer has network upgrade thingy.  After some initial confusion at setup some months ago, everything was working fine with only occasional problems printing from the laptop seemingly after installing suggested updates.  Laptop would have documents in the print queue, would get to 64MB and stall, nothing would print, managed to fix those problems by deleting and reinstalling printer from the original CD it came with.  My current problem is with the desktop pc, it was doing a similar thing as described with the laptop but the documents stayed in the  queue and would only print when I re booted the pc but they would stay in the queue and print again if I rebooted.  Sent email to dell tech support more than a week ago but have had no direct contact from them with any suggestions.  Now after trying various things it remains unresolved and in fact worse - now wont print anything from the destop at all.  Still prints from the laptop, if I put the printers IP address in the desktop browser in shows up OK.  At one stage when I was rebooting the desktop, there was an error about the spooler and I have since run cleanspl.exe and reinstalled the printer but get  "Printer Installation operation failed" error messages even though the printer is showing in "Printers & Faxes".  Am going to try a system restore now if I can find one dated before the problems, with me luck.