virtual pc

I install qnx on virtual pc of microsoft
I have been having the same problem.
I am using xp 32 bit. QNX4 installs and runs just fine.
I have disabled Windows Firewall on the host and chosen the right virtual pc network adaptor.
the virutal QNX can only ping itself and not to other machine on the same LAN subnet.
when i run nettrap start the message >> send( ) : register with Net manager failed
I’m using the default driver: Net.tulip -c21140 -I0 -l1 &, which worked fine under Windows XP.
my ip is the other pc

Many thanks