Setting up port duplex

I am trying to set up the speed duplex as "full", but the port not allowing me this operation, showing the error of unrecognized command, however beside this port, all the other ports on same switch are accepting the command.
Note: Cross cable is connected to this port.
Please suggest

Duplex is set to full on the other end, to make this end same, i want this also to be full, but it is not accepting the command?
What should i do?
show interface [offending interface] output is shown below
GigabitEthernet0/24 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0021.565b.9798 (bia 0021.565b.9798)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Half-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:14, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2000 bits/sec, 5 packets/sec
5 minute output rate 1000 bits/sec, 3 packets/sec
     8532345 packets input, 685285873 bytes, 0 no buffer
     Received 6122657 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     244 input errors, 113 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 5923756 multicast, 0 pause input
     0 input packets with dribble condition detected
     1215095 packets output, 147874876 bytes, 0 underruns
     0 output errors, 65 collisions, 1 interface resets
     0 babbles, 23 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

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