I keep getting input and crc errors on serial interface. I have changed WIC card on 2811 router and the cable connecting smart jack to the router. Other end of p2p T1 is clean. Any ideas what could be wrong?

I am trying to install an ether dual card (PA-2FE-TX)on a cisco 7206 router. Everytime I put the card in adn power rest the unit, it goes into rmon state and it does not recognize teh new card. I am running the latest IOS on the router. I have tried ...