I am trying to install 2 additional HWICs ( 2*FE) in a 2811 router but it is not detecting these interfaces. I am getting following message in logs,
"GT96K_FEWAN-1-UNKNOWN_WIC: NM slot 0, wic card has an unknown id 53A"
What could be the possible solution ? IOS version on Router is 12.4(23)