Masterserver Network problem in Android

I just wonder why networkings not work in Android.

I make network TCG using masterserver and It works very well in standalone.

I don’t know what’s the different between pc and mobile.

There has something different so that makes problem such that.

If you have seen or met like this problem, plz Give me tips T.T

Yes, he’s right, I realized that the nat can not connect the two devices, because of the 3g. but we will be able to play on Wi fi … My answer is try to use the address of the demo server… =)))))