It may well be the IBM laptop. Does the IBM have the Texas Instrument controllers (a requirement) for the PCMCIA bus, or, does it use proprietary drivers? In eight years of notebook based DAQ, I have never been able to get consistent performance from any IBM notebook interface (serial, parallel,USB, or PCMCIA). Our IT (information technologies) people claim that IBM does not always use industry-standard device drivers.
Often times, trying to set up a diagnostic process literally means taking one step at a time to isolate the fault. Since the 4472 worked on the desktop, ask what was the OS (2000, XP), what version of LabVIEW, what version of NI DAQ?
I have been using a 4472 in a Magma chassis with a Dell Latitude C840 with NI-DAQ 6.9.3 ,LabVIEW 6.1, and Win2K w
ith full bandwidth capabilities for almost a year. At the very least, LabVIEW 6.1 and Win2k should pose few problems. As the 4472 works on the desktop, that should not be part of the problem.
You could try to put a modem card in the Magma chassis with the IBM notebook. If the modem (or some other "cheap and simple" PCI device) fails to work, you can narrow the problem to the either the IBM PCMCIA bus or the installation of the MAGMA drivers.