Unable to print on the network printer

Hello All,

This is my first Post on this forum and i would like to ask for help on an irritating issue of a network printer.

I am a system administrator in Thomas Cook Goa location and in one of our branch there is a shared printer on a
particular hostname. Now here's the problem ...

All sharing ralated settings have been done in the Antivirus and firewall to which the printer is connected to.
the other computers can ping this PC, but when i try to type \\follewed by hostname or ip address I get an error message
saying that i do not have permissions to access the location.

The printer sharing pc was on win 7 and the other was on XP so i installed win 7 on the other pc also but still no luck...

Any advice??

Thanx in advance