Packaged AIR application fails to work as Server

Hi,

I have strange problem:
Then I test AIR application in debug mode - it creates working ServerSocket object. And acts as a server normally.
If I package it as AIR app and install on windows it stops working - server is not created on designated port...

CODE:
svn checkout http://logmaster.googlecode.com/svn/trunk/


host/socket: 127.0.0.1:4455

Is it sandbox problem? How to solve it...?
Or may it be because I am using generated Certificate?

Thanks for your help.