Can't print to HP 8600 Office Jet Pro from laptop

I have an HP8600 officejet pro that is shared on a wireless network by a desktop I5 PC and an Acer laptop both running W7 X64. For some reason when I try to print from my laptop it can not find my printer. If I look at installed printers it finds the HP 8600 fax but not the HP 8600 wireless printer. This problem just started recently.

What do I need to do?

Thanks

Don