BleepingComputer.com: Network Problem

Hi i have 7 computers 5 connected to a switch by ethernet 2 connected by wireless from a wireless router connected to the switch the computers using the ethernet connection works fine they have internet and network (file sharing) the 2 computers connected by wireless does have internet connection but they cant see the other 5 computers connected by ethernet they can just see them self thay all are in the same workgroup

I will be very thankful if some one could help me witch this