Hi there
Just thought I would post an update to the problem - It looks like it is the HP Jetdirect device that is giving trouble, but I can not be certain. The jetdirect device is connected to the network and the the Printer is added via server-manger. The Connection problems only started after Update 3 was installed, I am not sure if there is a connection between the two, but I will continue to monitor the situation and report feedback.
Thanks for the response Graeme and yes I did do just what you suggested, so that rules that out.
Cheers
Ashley