Why do I have to turn off the Firewall in Windows-7 to print to my wireless printer?

I caot print to my wireless printer unless firewall is tued off in windows-7.

This printer works fine from other computers coected to my wireless network. I thought that it used to work from this laptop also but NOT now and I have no idea why it quit working.

I know that it is the firewall because I can tu it off and the printer works fine from this computer. Only fails if I have the firewall engaged.