Need help on airport extreme conncetion

[dd44]

Hello to all,

I have a problem to connect my airport extreme? is anyone can help?
I can go on the internet but the internet has the Double Nat warning on my
airport utility. I try to change to the bridge mode, but it will pop up the message and said you have another device on the same ip address. I dont know why, and I would like to fix it. Please help.Thanks

 

[gigemzach]

I also have that issue saying the ip is in use by another device.

 

[dd44]

did any brother can help me out? and walk thru step by step
I've been working for few hours already, still cannot get it right