VPN in parallels working fine, not on mac side

I am using parallels 5.0 on my macbook and am able to VPN into my work via windows 7 using juniper software. I am able to get onto my companies intranet using IE with not issues.

I am able to access the internet on the mac side but can not access any internal websites using safari.

How do I get the mac side to use the VPN tunnel I've created in the win7 VM? Is this possible?

FYI, my network setting in parallels is set to shared and shared networking.

Thanks - Ed