to a PCI-GPIB is there any major changes I should make to my software (programs I wrote in Visual Basic 4.0 32-bit)? I ask because I can't communicate with my instrument now. And I know everything is installed correctly since IBIC works properly. Thanks.If you kept the driver version the same (both supported by the same driver) then you should have to nothing more than make sure that the bus addresses are correct. I would probably suggest rebuilding the application (http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&2F849CB1EC9BA573862568790070C4DC&cat=0B47FD0CFA7E3F6E862567F4005AD89C) using the language interface provide with the driver you have installed for the PCI-GPIB. Also, do the examples shipped with the driver work? Also, use NI-SPY as a means to track down the GPIB activity of your application.
In general, though, if you are able to successfully communicate using IBIC, the driver and board are properly installed and there is an application relate issue that must be addressed.
