Etherchannel between 2900 and 7200

Hello,
We have Etherchannel trunk set up between Catalyst 2924 switch and 7200 router. The trunk consists of 2 links with source-based forwarding, STP disabled on switch and on the router. For some reason, we can't achieve load-balancing on the trunk, that is, one link is currently used at 100%, another at 20%. We would like to achieve 50/50 utilization. Is it possible to do?
Thanks !
Konstantine

The Etherchannel trunk consists of 0/11 and 0/12 interfaces.Here's the output from "Show interface" command on a switch:
FastEthernet0/11 is up, line protocol is up
Hardware is Fast Ethernet, address is 0001.96bb.51cb (bia 0001.96bb.51cb)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 219/255, rxload 49/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 2w6d, output 00:00:40, output hang never
Last clearing of "show interface" counters 5w0d
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 19376000 bits/sec, 7347 packets/sec
5 minute output rate 86004000 bits/sec, 8 packets/sec
FastEthernet0/12 is up, line protocol is up
Hardware is Fast Ethernet, address is 0001.96bb.51cc (bia 0001.96bb.51cc)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 22/255, rxload 58/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:08, output 00:00:01, output hang never
Last clearing of "show interface" counters 5w0d
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 22747000 bits/sec, 7947 packets/sec
5 minute output rate 8678000 bits/sec, 2548 packets/sec
As you can see, the output rate on interface 0/11 is 300 times lower than on 0/12 and that is our main problem. We have a web farm here (around 100 servers), which is connected via Layer 4 switch to 2924 and then, via Etherchannel trunk, to 7200 router which is default gateway. We tried to use destination-based forwarding (on a switch), but that didn't change anything. The router AFAIK doesn't have any settings to change the forwarding.

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