Mac Pro Sleep Problems

I just purchased a Mac Pro and it will not go to sleep. Either by itself or when I try to put it to sleep. Also, I have 4 firewire drives hooked up to it and they will not go to sleep. They are running constantly and getting very warm to the touch.
Any help would be appreciated. Thanks!

Here is what I tried:
1) used the other ethernet outlet, but it did not solve the problem
2) unplugged my cable modem and airport to let them recycle and start-up again, but it did not solve the problem.
3) unplugged the ethernet all together, but it did not solve the problem
So, here is what the system log showed when I tried to pu thte computer to sleep, with the ethernet cable unplugged from the computer:
Sep 5 21:00:06 dans-computer kernel[0]: Intel8254x -- Link down -- 00:17:f2:01:33:ba -- called by disable() -- Auto-Neg Advertise Reg (04d) = 0xde1, Link Partner Ability Reg (05d) = 0x0
Sep 5 21:00:06 dans-computer kernel[0]: Intel8254x -- Link down -- 00:17:f2:01:33:bb -- called by disable() -- Auto-Neg Advertise Reg (04d) = 0xde1, Link Partner Ability Reg (05d) = 0x0
Sep 5 21:00:15 dans-computer kernel[0]: System Sleep
Sep 5 21:00:15 dans-computer kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
Sep 5 21:00:15 dans-computer kernel[0]: Started CPU 01
Sep 5 21:00:15 dans-computer kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
Sep 5 21:00:15 dans-computer kernel[0]: Started CPU 02
Sep 5 21:00:15 dans-computer kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
Sep 5 21:00:15 dans-computer kernel[0]: Started CPU 03
Sep 5 21:00:15 dans-computer kernel[0]: System Wake
Sep 5 21:00:15 dans-computer kernel[0]: FireWire (OHCI) TI ID 8025 built-in: handleSelfIDInt - quad count is even. issuing bus reset
Sep 5 21:00:20 dans-computer kernel[0]: Intel8254x -- Link down -- 00:17:f2:01:33:bb -- called by enableHardware() -- Auto-Neg Advertise Reg (04d) = 0xde1, Link Partner Ability Reg (05d) = 0x0
Sep 5 21:00:20 dans-computer kernel[0]: Intel8254x -- Link down -- 00:17:f2:01:33:ba -- called by enableHardware() -- Auto-Neg Advertise Reg (04d) = 0xde1, Link Partner Ability Reg (05d) = 0x0
Sep 5 21:00:21 dans-computer mDNSResponder: Repeated transitions for interface lo0 (127.0.0.1); delaying packets by 5 seconds

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7. I've run memtest two full nights, no errors detected.
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Fri May 16 15:04:18 2008
panic(cpu 1 caller 0x00192EE1): "pmapflushtlbs() timeout: " "cpu 0 failing to respond to interrupts, pmap=0x534500 cpustosignal=1"@/SourceCache/xnu/xnu-1228.4.31/osfmk/i386/pmap.c:4570
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0x5b44f8a8 : 0x12b0f7 (0x4581f4 0x5b44f8dc 0x133230 0x0)
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0x5b44f968 : 0x194033 (0x534500 0x3baed000 0x0 0x19d709)
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0x5b44faa8 : 0x169d64 (0xa06cdac 0x0 0x0 0x1000)
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0x5b44fc08 : 0x16b2b6 (0x1921e10 0x3baed000 0x0 0x3baee000)
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9C7010
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First reset the System Management Controller…
http://docs.info.apple.com/article.html?artnum=304123
… and immediate upon booting PRAM and NVRAM…
http://docs.info.apple.com/article.html?artnum=2238
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