file/printer sharing ports... Trend Micro Firewall issue - [H]ard|Forum

I have got one of my client has got a simple office network with three PCs (2 desktops A and B and one laptop C,,,,,all of them have got Vista Home edition).

Those desktop are connected through a modem router.

He bought a computer B recently and it has a Trend Micro Internet Security installed on it,,,,,,,a USB printer is connected to this B PC to be shared with A and C.

The other two PCs have not got Trend Micro Internet Security (I am aware of security implication , this is not the issue of our thread)

the printer is shared but A and C can not ping and can not print.

I am sure that the problem lies with the Firewall setting for Trend Micro Internet Security, because when I shut down it from A and C I can ping the B and I can print ,,,,while when Trend Micro Internet Security is running I can not ping B and I can not print.

I tried to search how to configure firewall to enable printer sharing I could not find that
XP, Vista, Printer Sharing and One BIG Mess - Vista Forums
If using Norton, McAfee, Trend Micro I.S., make sure file and printer sharing is enabled in THEIR firewall (or LAN allowed, depending on how their Exceptions are worded in their Firewall)
I tired google without any success.

Micro Trend internet security enable printer sharing how - Google Search


http://www.microsoft.com/windowsmobi...endmicros.mspx

Any idea how to configure the firewall to enable a printer sharing ?

Thanks