VLAN routing through VPN

[u080570]

I have 2 locations - connected via a VPN tunnel between PIX 515E firewalls. At each location, I have a data VLAN and a voice VLAN.

Im having trouble getting my voice VLANS to communicate through the tunnel.

Here's what I have working correctly:

data vlan site 1 <--> data vlan site 2
data vlan site 1 <--> voice vlan site 1
data vlan site 2 <--> voice vlan site 2

I can't get:

voice vlan site 1 <--> voice vlan site 2

I think my problem is my PIX config (I can post if needed) but Im not sure where to look. I have the VPN tunnel configured to protect traffic from both the data and voice vlans...but only the data goes through.

Any suggestions?

Thanks,
Mark