16-bit PcCard issue

Hi,
i developed a miniport driver for a custom PIO mode 16-bit PCCard . On some
machines the driver works fine. However on other machines (as i noticed with
cardbus controllers having Texas chipsets) i was not able to write or read
to the assigned ports. The driver installation is successful on these
machines, also no conflicts observed. I’m using NdisWriteUShort and
NdisReadUShort for read and write operations.
Is this a configuration issue, which should be solved in the .inf file.
Thanks in advance.

Best Regards
Yagmur Konuslu