Cisco asa 5505 to ATT DSL

Currently have a Linksys firewall connected to an ATT DSL provided (and locked down) Cisco router.

Static IP 12.11.200.122 255.255.255.248
Gateway 12.11.200.121
DNS 206.141.192.60 65.43.19.26
NAT on
Internal network 10.0.0.1-210 DHCP 90-210
It works fine

When I configure the Cisco ASA 5505 with the wizard I’m using all of the above with the gateway as a static route on outside and a range of 11.11.11.0-50255 255.255.128 for NAT
everything else is the defaults. I can’t get internet connectivity from inside. Any ideas?