problems connecting to PC

Hi I'm a bit new to networking so please bear with me. I've just downloaded playerxtreme and cant share files with my PC. I have the add on and I can see two "HOME-PC"s on the network tab. one gray box the other a monitor. the monitor one could not open directory smb://192.168.1.64 (13:permission denied). The gray box has a folder system of my libraries, but as soon as I try to open a file the app crashes!

Can anyone help me please?

I have followed the link below
http://wiki.xbmc.org/index.php?title=SMB/Windows