@bajaj
Try manually assigning IP addr to ur PC's thru netwrk connection - rite click ur LAN - properties.Assign diff. nos to both PCs. After dat, ping ur pc's
E.g: 1st PC IP addr is 192.168.1.25 n 2nd PC it is 192.168.1.26. Now in 1st PC, go to Start - Run - command - at commnd prompt type - ping 192.168.1.26. Repeat d same procedure on 2nd PC n replace 26 wit 25. C if it is successful...