I am having the same problem Vidi is having. I tried adjusting the memory and nothing happens. I can't find a way to increase the ems, only a way to disable it, then it just complains about not having ems support at all.
I also tried using VDMSound and it does work with that, but the mouse is really slow. I downloaded mouse2kv.exe to help with the problem, but when I batch run it with VDMSound, it then tells me "55 KB DOS-Memory missing." To fix this, I tried disabling the "DPMI Support (DOSX)" checkbox in VDMSound and managed to lower the amount missing so it said this, "21 KB DOS-Memory missing." I tried to disable other options to free up more memory, but I couldn't find any other settings that would help in either Dosbox or VDMSound.
Does anyone have any other ideas?
Note: I did notice that the message for Dosbox and VDMSound (with Mouse2kv.exe) differ in that Dosbox's message was about ems memory and VDMSound was about DOS memory. I hope some of this info can help.