Dude,
I had the same problem the other day. Go in to the security applet, firewall settings and loosen up the File & Print Sharing option, also loosen up ICMP inbound aka PING, then PING 19.. etc and do a
\\192..\share etc to get the login prompt
Secure by design.. 
Rob Atkinson
Kilkenny, Ireland
blog: http://spaces.msn.com/knowledgebyte
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