noob printer sharing help

[dominic]

Hi, I am very new to networking.  I have set up a file server running Zentyal 2.2 and am trying to share an HP printer with windows 7 and vista machines.  I have managed to get the printer to show up in the network directory, but when I select it, I get the Windows error "Operation could not be completed (error 0x00000005). Access denied.)  I'm not sure where to go next.  Please can anyone give me any advice?