Passes RAM test, but hangs at jumping to RAM

[SONE Takeshi]

What could be a problem when it passes RAM test but hangs 
immediately after jumping to RAM?

I'm developing a new raminit code and
this happens only with a particular installation of DIMM.
DIMM itself is not bad, it works when move to another slot,
or another slot is filled with another DIMM.
Award BIOS runs just fine with this DIMM installation.

LinuxBIOS-1.0.0 Thu May 15 07:27:04 JST 2003 starting...
Enabled first bank of RAM: 0x10000000 bytes
Testing SDRAM : 00000000-0009ffff
SDRAM fill:
0009ffff
SDRAM verify:
0009ffff
Done.
Testing SDRAM : 00100000-01000000
SDRAM fill:
01000000
SDRAM verify:
01000000
Done.
Copying LinuxBIOS to ram.
Jumping to LinuxBIOS.
(hangs up here)