Can't seem to print from Photoshop Elements? You're not alone. People have reported similar problems from Photoshop Elements 7, 8, 9 and 10 from Windows Vista and Windows 7. It either prints a blank page, causes the printer to go into an error state or doesn't do anything at all.
The problem isn't just with HP printers either. The cause appears to be that the names of the printers are too long. As a result, the short form of the names of the printers (printer and fax) are identical. The solution is to rename one the printer or the fax to something completely different. For example, changing "HP Officejet 8500 A909a Series Fax" to simply "Fax" should do the trick.
Hopefully Adobe will fix this little bug and allow for longer printer names in future releases.