I have win98 OP on my pc, my modem used to work fine before, but recently after I get on internet a very short time, my modem always is disconnected, and then this message comes up:
"hardware access layer Vxd call service failure" and then another window "Data pump error". Please tell me how to fix this problem.

first try reinstalling the drivers and see how you make out

Thanks, E.
Yes, I have tried many times to reinstall both OP and the driver of modem, but everytime after reinstallation, it can only work for a very short time, then the same problem happens again. Please help me to find the reason.

Uninstall any programs that are modem related in add/remove programs. Then uninstall the drivers from within "safe mode". Turn off the pc, remove the card.

Boot in safe mode & make sure all the drivers are gone.

Turn off the PC, re-install the card and go from there.

If it still won't work right, you probably have a modem problem.

Good luck!

Thanks, DaveM,
I have followed your instruction to do, but the same problem still exists,and I see this messgae "hardware layer access Vxd
unable to initialize the modem".

I open Control Panel and click modem icon, then perform the diagnose, sometines the communication is OK, but sometimes it tell me "opencomm". Don't know what's hell going on?

Is this a hardware or software problem? Help me.