failure to initialize VKD device?

After fdisking,formatting,and reimaging a Toshiba 2590cdt laptop with win98, iI still receive the message.”While initializing device VKD: Windows protection error. You need to restart your computer.An internal stack overflow has caused this session to be halted.Change the STACKS setting in your Config.sys file,and then try again.”The curious thing is if I f8 it and choose to boot on bootlog mode the machine seems to work fine until I need to reboot again.