Greetings from the "holy land" for the new years :O)

Installed a new X61S laptop in an office with other 2 computers, All with xp pro sp3, Connected through an Siemens ADSL router.
Computers are protected with NIS 2009 configured with FULL TRUST for all computers.
I had some problems trying to print several times from the X61s to an xerox all in one x215 printer which is connected to the secretary computer.
I could ping from the laptop to the sec. computer, But couldn't ping back.
I found out that the windows firewall was enabled on the laptop in addition to the NIS smart firewall, So I disabled it and managed to ping from the sec. computer to the laptop.
Although the laptop tried to access the sec. computer in order to print, Might the windows firewall be the reason for not being able to print ?