Can RRAS implement port farwording using one net card?

Now I can use netsh implement portfarwording.

source ip port:59.*.*.* 15000---->Des ip :114.*.*.* 14330

But I want to Know How to implement this from RRAS.

in my computer with ip 59.*.*.* ,I have only one netcard.

I config as follows:

1.start RRAS

2.SELECT "CUSTOM"

3.nat and basic firwall

4.ip routing ->nat and basic firewall->add interface->local interface

5. on nat basic firewall tab,I select " public interface and connect internet"--> "use nat on this interface"

6.on address pool tab,I add my only one ip address 59.*.*.* and its subnet mask

7.on services and ports tab,I add "incoming port" 15000;privae address 114.*.*.* ;outgoing port:14330

8.finish

9.When I connect 59.*.*.* ,15000,I can see this mapping.

but connect is not success.(telnet 59.*.*.* 15000 also fail)

I do not know where is wrong. And I use netsh is success.