3040 does not register on new WMS

Hello, i have installed WMS 1.1 with DHCP Options

165 WMS

166 MQTT

167 CA Validation

199 Group Token

Now i installed WMS 2.0 and change the DHCP Options on another DHCP Range for the new WMS But the Wyse 3040 Clients does not recognize any automatically change.

Only manually change works fine. Any Idea? thanks