Hi Team,I have Cisco 2801 router with 2 DSP 16 Channel, 128 MB DRAM and 128 MB flash. I am using IOS c2801-spservicesk9-mz.124-3i but the VIC3-4FXO/DID module is not detected. I tried to upgrade the IOS to 15.0 and 15.1 but the router is not boot up ...