PIX 515 and Security Applicance Connectivity Issues

I am connecting a server to a security applicance connected to a pix 515.
The PIX and the appliance are connected via a 192.168.1.0 Vlan
The Appliance and the Server are connected via a 192.168.11.0 Vlan
I can ping the appliance from the server.
I can ping both interfaces of the appliance from the server.
I can ping the firewall from the appliance.
I CANNOT ping the firewall from the server.
If I connect the firewall directly to the server and put them on the same Vlan, I can ping the firewall.

So, is the reason why I cannot ping the firewall that the firewall and the server are on 2 different Vlans, and that somehow the pix is blocking the reply?
Or any other reason?