Bad Address with Win2k8 Bridge

I am a newmember.
May be this problems was post, but i can’t see.
I using RB951ui for ap bridge, not dhcp. It connect with the same AP via Bridge WDS.
But in the DHCP windows 2k8 it show Bad address like the picture.
Please help me, i have 20 ap wireless, all of them having cable cat6, I want they mesh together, never drop internet, and full roaming.
How should i setup for it. and what is the best mapping between many RB ?
Thanks.