Default IP Adress does not work after reset to factory default.

Hello

I have a problem with the default IP of a HP LaserJet P2015. If I unplug the LAN cable the default IP is set.

As soon as i plug it back in the adress does not work and if i print the summary page now there is whritten:

IP-Adress: Configuring (it does not stop to configure after 1 hour waiting it is still configuring.)

and:

Auto-IP: Enabled

I think the Auto-IP (probably DHCP) is the problem... but how do i disable it?

Thanks

Jay