[U-Boot] Problem booting Linux

[Remco Poelstra <remco.poelstra@duran-audio.com>]

Hi all,

I'm trying to get Linux booting on an ARM7 (NXP LPC2468). I copy the 
uImage to 0xa1500000 and the romfs.bin to 0xa1800000. I set bootargs to: 
root=/dev/ram initrd=0xa1800000,4000k console=/dev/ttyS0,115200N8
When I do 'bootm a1500000', it finds the image and tries to uncompress 
it, but it goes silent after printing    "Uncompressing Kernel Image ..."
When I try to create the uImage with
'mkimage -A arm -O linux -T kernel -a 0 -e 0 -n "Linux Kernel Image" -d 
linux.bin uImage', I get the following output (mind the absent -C flag):
-----------
Image Name:   Linux Kernel Image
Created:      Thu Mar 12 15:37:01 2009
Image Type:   ARM Linux Kernel Image (gzip compressed)
Data Size:    1986268 Bytes = 1939.71 kB = 1.89 MB
Load Address: 0x00000000
Entry Point:  0x00000000
---------
bootm also still thinks that the image is compressed and bootm prints: 
Uncompressing Kernel Image ... Error: Bad gzipped data
GUNZIP: uncompress or overwrite error - must RESET board to recover

How can I make sure that the Linux image can boot?

Kind regards,

Remco Poelstra