I had similar problem accessing via a wifi enabled netbook, I posted in another thread what worked for me, was to check the network adapter settings, selecting properties of the adapter being used, then selecting IPv4, properties, advanced, WINS tab, in WINS page at bottom select "enable NetBIOS over TCP/ICP" instead of the default radio button, apply setting, repeat for the IPv6 protocol for the adapter, save and exit, and that worked for me..!!
Hope it helps..!!