Network Security Map

I just installed NIS 2011 on my laptop after I uninstalled NIS 2010

Under Network Security Map there should be 3 devices showing:

 My laptop

My XBOX

My Desktop

There is only the Laptop Icon showing.

 

Does anybody know how I can run the Network  initialization again and/or why only 1 of the  devices is showing in my network? I am not too concerner that the other 2 devices arent showing, my worry would be that i might not be aware if an unidentified device connects.

Thanks Kevin