Cannot Access NAS from Windows 7 anymore

I am having the same problem. This is a recent development as I've owned my 2 ReadyNAS Duos for a couple of years now and never had any problem accessing htem before, either from a Windows XP or 7 machine. I hadn't logged in for a while, but was having trouble accessing one of my drives from my PS3 and wanted to see if there was a setting problem. Raidar was able to see the drives, but when I tried to go to Setup, IE9 tells me that it cannot display the webpage. When I click on Diagnose Connection Problems, after a few moments, I'm told "The remote device or resource won't accepth the connection". My XP machine has IE8 on it and has a similar problem, though the error message is slightly different. I can view, read and write the files on teh drives without a problem, but can't get to setup/login as admin on either machine. I have Norton Internet Security on the W7 computer and Mcafee on the other, though I've tried turning off various portions of hte protection including Smart Firewall to no avail. I do recall that I used to get a message relating to a bad certificate, but it's not getting to that point in the drive access now. Any help would be appreciated.