Configuring VPN between a very old PIX and an ASA

Hi all! My company acquired another small company which currently has a very old PIX. I need to configure a temporary VPN connection between one of our ASA's and the PIX. I have the VPN in place but am not seeing any traffic from the PIX to our ASA. I do see traffic to the PIX.

I think it is an issue with the nat rule but, due to the age, the syntax is different.

I need to have traffic from the 'VOIP' interface on the PIX route to the 'inside' interface on the ASA.

Any help is greatly appreciated!

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ASA

(inside) 10.10.12.1

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PIX

(VOIP) 192.168.1.1

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PIX NAT Statement:

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access-list ASA-PIX-ACL extended permit ip VOIP_LAN 255.255.255.0 10.10.12.0 255.255.255.0 nat (VOIP) 0 access-list ASA-PIX-ACL