unable to login via WAN

Hi,

I've successfully setup Openfire and Spark IM client are able to login and chat locally.

I tried to NAT the local IP to a WAN IP. Tested it by putting in the WAN <IP address>:9090 and :7070 both are accessible but whenever I used the application it just says

invalid username or password.

FYI: I've attached this to an ldap to use Windows credentials

I'm pretty sure Im missing something here.

Thanks

jepoy