pf NAT rule isn't working

[flit]

Hi all,

I am running OpenBSD 5.1 in VMWare, I am using it as a firewall with 2
interfaces, and I am using the rule:
pass out on vic0 from 192.168.0.0/24 to any nat-to 192.168.101.8

to allow NAT but it is not working, because when I ping host A from host B which is behind the firewall I can still see the real IP address of host B in host A, it is not being translated to 192.168.101.8.

vic0 = 192.168.101.8
vic1 = 192.168.0.8

host A --> vic0 [OpenBSD] vic1 --> host B

Can anybody help me fix this issue?

Thanks in advance.