Booting LxNETES from tftp

I use a ConnectCore 9P board with NS9360. I am trying to boot Linux kernel from tftp and nfs. But the systems stops after decompressing the kernel. Last message is:
"Uncompressing Linux … done, booting the kernel.

Then it hangs.

I tried with a compiled image, then I tried with the image provided on CD-rom, but the result is the same.
Any idea?

Thanks in advance,

I found the problem: The console in bootargs was not set to tty, so when starting the messages were not received by my console.