Changing your Port on YM for better voice connection

Some of us may face a problem with yahoo messenger's voice connection. Here is a tutorial on how to avoiding lost your voice connection on YM.
Change your port into 8001

Start>> Run>> type in the box "regedit" >>HKEY_CURRENT_USER>>>Software>>>Yahoo>>>Click on Pager Folder , you should see the regskey on the right of panels , there is a DWORD Value call "Port" << double click on it >> In the Box Value Data change the Value into "1f41" >>OK and restart your YM