Here are the few possibilities why this is happening:
1. The cable used between the device and the port could be faulty. Please try changing it and make sure that you have factory made straight cable.
2. Either the port on the module or the NIC on the device could be faulty.Try connecting some other device on the same port or try moving the device to some other port to diagnose the problem.
3. The card is not properly installed on the router. This could be diagnosed with the output of " show version" from the router.
Please check the above steps and revert.
You need to include the version of IOS when you supply this output, else its not useful. Also can we see a "show diag"? What type of card are you using? What version of IOS? Please provide this information.