I ran into a similar problem running on beta firmware of a different mfg. What I found was my password was too long, and had chrs it did not like. Just something to look at.
Yes to defaults. It has to do with the firmware using Java and scripts. If you are use IE it should work. If FF or others may not. I had one pc that worked with FF and one Not. Use IE.
Firewalls can block it, if you changed subnets.
Clear out temp internet files (cache). So it doesn't try to reload cached pages.
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