Netgear duo windows 7

If I type 192.168.1.66/admin it takes me to the Raidar set up screen, i can get this when i click on the Raidar anyway my problem is i cannot browse files hence cannot add or edit files, windows media player shows all the files on the NAs and i can view them but i cannot edit or add to them. the error message i get when trying to browse has changed from my first post, i guess due to my tinkering it now reports windows cannot access 192.168.1.66 and returns a error code 0x0070035 the network path was not found, all the settings in the Nas are the same on both machines as are the IP address (192.168.1.66), Im on version 4.1.7 (1.00a043) on both machines although they look slightly different. Im not sure if this has any relevance but i added a tendra network wireless pci card a week ago, which as far as i can tell is working fine, previously i was using a wireless network dongle, using that i could browse the NAS files, i changed it to the pci because it was causing windows 7 to crash dump all the time. I have reinstalled the Netgear software several times which has made no difference to this problem