Hi,
the static command will overrule the PAT/NAT statement if you specify the ports in the static command.
I am not sure if it will work if you use a static command without port information.
More info on this link:
http://www.cisco.com/warp/public/707/28.html#topic9
You will have to use port redirection, but instead of specifying different ports for the public and the private address, use the same port two times.
For example:
static (inside,outside) tcp 172.18.124.99 ftp 10.1.1.3 ftp netmask 255.255.255.255 0 0
The shared address can be a unique address, a shared outbound PAT address, or shared with the external interface.
Kind Regards,
Tom