NAT not working

[dpreviatti]

Hello guys! This is my first post, sorry if I forget some rules to post.

Well, I am using pfSense for a couple of months and I am facing now a little problem.
I have to forward an RDP connection to one of my desktops.
I create the NAT rule (the most default) for just one of the wan.
Here are some prints:

I cant get it to work…
Am I missing something?

ps: I have followed a howto of the forum to config this cenario of multi-wan...
http://forum.pfsense.org/index.php/topic,37083.0.html