We will need some more information to be helpful:
- What firmware version are you using on the iAP205?
- Are they sharing the VLAN with clients, or do they have their own VLAN for management?
- How are they connected (is layer-2 up and stable, do they have good power, etc.)
- have you looked at the logging kept on the VC to see if there are any issues?
It is possible that in answering these you will find and fix the issue. Please report back to the forum if that happens so we can learn from what you find.