I have 3 1DSU-T1V2 cards in HWIC0-2 slots and tried to plug a HWIC-1FE in the HWIC3 slot but it is not showing up. I have upgraded the IOS to 12.4(12b) from 12.4(3g) but it didn't help. All the lights are green but it doesn't show up in either the cli or sdm. The router was powered down while the card was inserted. Any suggestions?