PIX 520 Not Passing VPN Traffic

[kirkdw]

I have version 6.2(2) code in my PIX but cannot get traffic to hit the PIX. I have an external router between PIX and Internet but there are no ACLs applied. When attempting a connecting to our public - there is no traffic at the PIX.

My VPN specific lines are:

access-list NONAT permit ip 172.20.4.0 255.255.255.0 172.20.7.0 255.255.255.248
ip local pool ADDRESS 172.20.7.1-172.20.7.7
nat (inside) 0 access-list NONAT
sysopt connection permit-pptp
vpdn group 20 accept dialin pptp
vpdn group 20 ppp authentication pap
vpdn group 20 ppp authentication chap
vpdn group 20 ppp authentication mschap
vpdn group 20 client configuration address local ADDRESS
vpdn group 20 client authentication local
vpdn username john password test
vpdn username david password test
vpdn enable outside

Can someone tell me what else is needed? Thank-you.