Wi-fi immediately disables I have a Samsung Captivate.

This week, it's wi-fi stopped working.

To be more precise, it's wi-fi recognizes there is a wi-fi router nearby (my home's), and tries to connect.  But it immediately disables and tries again in an unending loop.


I have not tried connecting on another hotspot.
I have installed a couple of programs this week, but I don't remember any of them being wi-fi related.
I recently put JuiceDefender on aggresive mode, but now I've disabled it, and wi-fi still doesn't work.
Tried enabling/disabling Flight Mode, but no success.
I've restarted my phone a couple of times.


UPDATE (04/15/2011)

I managed to connect to a nearby hotspot, so I'm guessing the router is the problem.  It is a 5yrs+ old router (linksys).  What's strange is that my PC is connected to the router by LAN cable, and still works.  Also, I was able to enter it's configuration page (192.168.1.1).  Probably some hardware is damaged.

UPDATE (04/16/2011)

NOW I´m confused.  I connected to my router with an old low-grade tablet I forgot I had, with no problems.  I'm guessing now that the problem must be some app I installed on my phone.

CONCLUSION (04/16/2011)

I just had to press the router's reset button on the back, and now my phone is connecting.  Thanks to all who commented!
Delete the saved network from the phone, then reboot both the phone and the router and try again.  If that doesn't fix it you'll need to test with another network to see if it's a phone issue or not.