Unable to boot kernel from U-boot

I have ported a new kernel 2.6.35 to S3C2440 development board, in the kernel I set the same machine type with u-boot.

After download to NAND Flash and boot with the new kernel, from serical
port, it display the following message and be stuck.

Booting Linux ...
Copy linux kernel from 0x00200000 to 0x30008000, size = 0x00300000 ... Copy Kernel to SDRAM done,NOW, Booting Linux......
Uncompressing Linux... done, booting the kernel.

How can I fix this problem?
Thanks!

There may be many reasons. First, enable all boot kernel messages. If you don't get anything it's likely that the kernel doesn't even start. That would mean that something's wrong in the image copying/uncompressing.