I have a laptop, i have pluged it with a wire which is near to the router it worked but when i connected it a wire which is 60m away from router it says "UN-identified network", please help me to resolve it.
60 meters may be too far, try from closer first to see if distance is a factor which i would say it is.
if this fixes the problem Try using a better arial or making a parabole google windsurfer for a simple 5minute design.
If it doesnt fix the problem ensure you have not set a static ip address under the network controller properties then on the wireless tab delete all profiles and try again ensuring you have the correct settings as on the router you may need to login to the router and adjust.
What operating system are you using and wireless utility? if you need more help that is.
although 120 ft,is not really far ,the max for ca5 is about 300ft.if you are using cat6 [max is about 700ft ]cable then i would try a length of that ,signal deteriorates as it gets farther away from the source