Multiple DHCP servers invalid

Hi,

I’m new to MikroTik products and RouterOS, so this might be a very simple fix. I have a CCR-1016-12G running ROS 6.0. I have configured 4 bridges, with a vlan attached to each. The first bridge uses ether 1-4, the second 5-6, the third 7-8, and the fourth 9-11. ether12 serves as my wan interface. The first DHCP server works as expected, however the other 3 are shown as invalid. I have tried attaching the DHCP servers to the vlans, which does not work at all. Am I missing something here?

Edit:
I neglected to assign IP addresses to the vlan interfaces…

indeed, one thing that usually is missing - check if IP address is assigned, check if you have assigned DHCP-server on the master interface, check if IP address is assigned on master interface.

[admin@MikroTik] > ip address print detail 
Flags: X - disabled, I - invalid, D - dynamic 
 0   address=192.168.0.155/24 network=10.5.8.0 interface=ether1 actual-interface=ether1 

 1   address=192.168.1.1/24 network=10.5.113.0 interface=ether2 actual-interface=ether2 

 2   address=10.5.50.1/24 network=10.5.50.0 interface=ether6 actual-interface=ether6 

 3   address=192.168.88.2/24 network=192.168.88.0 interface=ether2 actual-interface=ether2

so that actual-interface is equal to interface where DHCP-server is assigned.