Problems with Asus 500gx wireless router

Hi all,

I have a asus 500g deluxe wireless router and I am having problems with
its wireless access. Today I had to disconnect it from the power, and
strangely it had lost all its configurations, so I had to do the setup
all over again.
This step wasn't a problem. The strange this is that now when I try to
connect on the WiFi I get a good connection, but it doesn't go to the
Internet.
So, when I try to use a LAN port the Internet is working just fine. I
don't know what might be the problem. Could someone give me a little
hint?

Regards,
Pablo

I forgot to say. I had the 1.9.5.0 firmware and after what happened I
updated to the 1.9.6.0 version but the problems remained.