Most can't get all the numbers right so that's a source of trouble. Also firewalls do this a lot.
Good luck but it does work once the above is taken care of.
I have a HP C7280 hooked up by wireless to my D-Link 524 router. My PC that is hooked up via wire to the router and works great with the printer. All PCs and the printer have static IP addresses. My 2 PCs are: Desktop - Athlon X2 4200+ WinXP MCE 2005, 2GB RAM, 160 & 250GB HDs; Laptop Sempron 3000+, 1GB RAM, WinXP Home 40GB HD.
I used the newest drivers from the website for install not the CD that came with it. I installed the driver, Imaging assistant, HP Update (manual updates only), and one other thing.
But when I tried to install the printer on my wireless laptop, it could not find it for any fixed time (it could find it during install) but not after. So then I hooked it up the laptop via wire and it found and kept good communication with the printer until I unhooked it and went wireless with the laptop...now it can find the printer (after clicking Us Printer Online) part but not the scanner. I've searched and searched for info on this but only find help on ad hocing, not this issue.
Does anyone have experience with this? I'm beginning to think it's some kind of port forwarding issue maybe?