Question : Cisco 1841 Router won't recognize new HWIC 1FE Card

I have a Cisco 1841 router with two open slots.  I purchased a CISCO HWIC ONE-ROUTED PORT and installed it into port 0 and port 1.  But, the card shows up in neither port when I do a sh interface.  Am I forgetting something?

Answer : Cisco 1841 Router won't recognize new HWIC 1FE Card

What version IOS do you have? You might have to upgrade to another version that has the drivers for the HWIC card. Which exact HWIC model do you have?