I have a HP pavilion dv9000 and a HP Officejet 7410 all in one printer. I finally set it up for wireless. I can print via wireless but when I try to scan I get an error message: An error occurred communicating with the scanning device. Any help??

It seems to be a Known issue with HP all in one printer. Follow this link from HP website:
HP All-in-Ones- 'An Error Occurred Communicating with the Scanning Device' Message Displays on the Computer in Windows 2000 when Attempting to Scan from HP Director - HP Customer Care (United States - English)

If the issue still persists, Contact HP at 18004746836