hang up when booting the kernel
hi all, i install two OS fedora core 4 which is kernel 2.6.14 used for
target machine and the other is 2.6.11 used for develop machine.

vmare 5.5.3
OS:fedora core 4
develop: kernel 2.6.11
target: kernel 2.6.14
kgdb patch:kgdb-2-2.6.14.tar

Code:

title Fedora Core(2.6.11-1.1369_FC4)
root (hd0,0)
kernel /vmlinuz-2.6.11-1.1369_FC4 ro root=/dev/VolGroup00/LogVol00
initrd /initrd-2.6.11-1.1369_FC4.img
title Fedora Core(2.6.14)
root (hd0,0)
kernel /vmlinuz-2.6.14 ro root=/dev/VolGroup00/LogVol00
initrd /initrd-2.6.14.img

the develop machine and target machine are both boot up successfully, and i
make suer the two OS can communication each other by serial(i user ttyS0,
Baud_base:115200)

but when i modify grub.conf into , the target machine will hang up at

UncoMpressing Linux... OK,boot the kernel

Code:

title Fedora Core(2.6.11-1.1369_FC4)
root (hd0,0)
kernel /vmlinuz-2.6.11-1.1369_FC4 ro root=/dev/VolGroup00/LogVol00
initrd /initrd-2.6.11-1.1369_FC4.img
title Fedora Core(2.6.14)
root (hd0,0)
kernel /vmlinuz-2.6.14 ro root=/dev/VolGroup00/LogVol00 kgdbwait
kgdb8250=0,115200
initrd /initrd-2.6.14.img

is there anyone met the problem befor? please give me an advice , thanks