Dave,
This could be an issue with the socket service being used to allocate the resources on the laptop. The posting below has a pretty good explanation of how to troubleshoot this (refer to the posting by Jason Hobbs). If that doesn't work I'd call into the NI Support center.
Best of luck,
Kamran
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=506500000008000000D10A0000&ECategory=Instrument+Connectivity.GPIB