Need Help - After changing ip adress cant connect to the piratebox

Help help! :

Yesterday i got my piratebox on th "3020" running.
Then i thought it would be great if i could run php on it.
So i followed the tutorials on changing my ip to download php
I changed it and as i rebooted the box i noticed that i cant connect to the piratebox anymore
My devices try to get a connection but the box doesnt serve.

But i get a connection as soon as i plugg the box into my router.
I even can ssh into it
I get connection to the net via the box and i even can install php

But still if i unplugg it from the router and try to connect to it via wifi
i cant get any connection

I am stuck on that problem :
I tried : changing the ip
( even if its back to the old ip the problem stays)

I reinstalled the box serveral times

I searched a lot tutorials
: couldnt find anything


Can anybody help me?
Thanks