Do you have 2 network cards installed in the VM? Can you post your x:\mptn\bin\setup.cmd?
I even have 4... First one I keep for NAT, the others for bridged mode - second one for docking station wired, third for laptop's wifi, fourth for laptop's internal wired. I swap second and fourth when I have wired ethernet on the go, without my docking station.
Contents of setup.cmd:
route -fh
arp -f
ifconfig lo 127.0.0.1
REM ifconfig lan0 nil metric 1 mtu 1500
REM ifconfig lan1 nil
REM ifconfig lan2 nil metric 1 mtu 1500
ifconfig lan3 192.168.1.200 netmask 255.255.255.0 metric 1 mtu 1500
REM ifconfig lan4 nil metric 1 mtu 1500
REM ifconfig lan5 metric 1 mtu 1500
REM ifconfig lan6 metric 1 mtu 1500
REM ifconfig lan7 metric 1 mtu 1500
dhcpstrt -i lan1
REM ifconfig sl0
ipgate off