hi 2 every1

i m using dosbox to run my TC in full screen in vista 64 bit. usually i give 3 commands namely:
1. mount s c:\tc
(drive s is mounted as local directory c:\tc)
2. s:
3. tc.exe
nw the errors come like this:

"failed to locate dpmi server (dpmi16bi.ovl)"

please help me to get out of this problem.

thanx in advance