Unconfigured I/O Address Used

Hi All, 

I am encountering an issue with my Allen Bradley MLX 1200 processor when trying to use the integrated PLC I/O channels I:0.4 - I:0.13 I am getting the error "Unconfigured I/O Address Used". 

I'm using RSLogix 500 to program the PLC. 

I have tried to configure the I/O however it doesn't seem to allow me to 'Activate/Configure' I/O past I:0.3.

Has anyone seen something like this before? 

Thanks

CThornton