There are several factors which may cause a problem.
Look
here for the Netgear specs. They offer a 24h free phone helpline. Unfortunately they do not state recommended maximum length but, it would surprise me if it less than 100 metres.
Interference with the cable is always possible, don't bundle the cable to a roll when testing.
One more thing is to check the LAN adapter of your Notebook, is that capable of 60 metres???? Some are not and this is quiet frequently a problem.