Did you put your primary DNS and secondary DNS in for your ISP? IBrowse needs this - try putting this IP address in IBrowse to test the connection:
64.17.72.249
If it works then you need to put in your ISP's DNS settings.
To connect to a PC goto the Host Manager, add the PC's IP address and network name and then SAVE. Go back into the host manager, highlight the PC name and click Connect to.. This will allow you to connect to a network share on the PC.