Troubleshooting printing - no output

Got printer on one server set up to print via another server.

Here is printers.conf on server, server1

printer2:\

        :bsdaddr=server2,printer3,Solaris:

On server2, we've using cups, here is printers.conf:-

printer3:\

        :bsdaddr=server2.internal,printer3:\

        :description=orders printer:

printer4:\

        :bsdaddr=server2.internal,printer4:\

        :description=orders printer backup:

I can send a test print from server2 using "lp -d printer3 filename"

If I send a test print from server1, "lp -d printer2 filename" I get nothing. Not even in the print queue.

Where I start seeing where the prints are going?