Network printer

I have five XP computers on a wired peer-to-peer network. One computer acts
simply as a print server, and the internet is excluded from it.

I have now installed Windows 7 on one of the computers, but whilst it can access
the XP computers on the network, including the one that acts as a print server, it
will not connect to any printer. Instead it gives a message to the effect that
the print spooler service is not running on the print server. However, I have
checked the print server XP computer and the print spooler service is running (it
starts automatically) and also its helper RPC service is running (also starting
automatically).

Any suggestions about what I should try would be very welcome.

Kind regards

Brian