android SDK build error

I have made a little game for android but when i build it, it ask me to select the folder where i installed SDK and when i select it, it freezez. So, what's the problem, how can I fix it?

If you’re still having this problem, try the solution posted here:

http://answers.unity3d.com/questions/56305/android-building-bug-trying-to-locate-android-sdk.html