problem viewing network shared folder on mac os x

Hi all . i am using mac os x and trying to view the shared files and folder on the network. There is a icon called data below the screen once i click on it a window pops up and i do not see my shared folder from the network!! i am connected to the network via wireless airport stream.I have internt connection but can not view the shard folder. There is another mac computer in the same room and that one is working fine and i can view the shared folder. I am new to mac could any expert help me fix this problem and view the shared folder on the network on mac.Thanks