EA6500 - wont connect unless IP's are static

Having a problem with my EA6500.

As long as devices have static IP addresses they will connect to the router and through the router to the internet. Any device that is configured to use DHCP will connect to the router but doesnt have internet access.

Firmware version: 1.1.40.160989

Connection type: Automatic Configuration - DHCP

NAT is enabled

Wireless SSIDs\passwords are different

No MAC filtering

Thoughts or ideas?

Thanks in advance!!