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Error installing T1 WIC in 1721 Router


I have a 1721 Series Router running IOS Version 12.2 (11) T2.

When I put my WIC 1DSU-T1 V2 into Slot0 and power it up, I receive a "wic card has an unknown id of 0x52" error upon startup.

I have another 1721 Series Router running the same Version and it is working fine - as long as there is another card (configured or not) in the other vacant slot.

Also, I must note that the card in the other slot (Slot1), does not show up in the config or when I do a show vers. It is merely a "dummy" card.

Has anyone else seen this?

Is the IOS not compatible?

Thanks in advance for your help.

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