You did the right thing with the firmware and such, but add these:
1. EWIDO from download.com
2. Working or not I run WINSOCKXPFIX from google.com to correct any stray TCIP settings.
Sorry, I've found no do this cure with what clues you provided.
I have a Dell XPS GEN 5 with XP PRO I have the printer connected with a network cable to a netgear Ethernet Switch then a network cable to the computer. Sometimes this connection has worked and sometimes it doesn't. I have installed Web Jet Admin version 8. The printer has firmware version A 05.05 with a Jet Direct card J2552B. On the computer screen there is a yellow caution sign on the local area connection which calls out limited or no connectivity. I can not ping the printer. Does anyone have any ideas on what to do.
I have Zone Alarm installed when it worked and when it doesn't. I even uninstalled Zone Alarm and it still does not work.