mount: / mounted already or bad option

  Hi
I have Gentoo linux in my PC
I just installed the kernel 2.4.22 and compile it and install it (using 
genkernel command)
Right now if I reboot my PC with my new kernel I got :
mount: / mounted already or bad option
and the system stop and ask me to type the root password
and when I login with the root and type
mount -o remount,rw /

I got the same message
mount: / mounted already or bad option

but if I write
mount -o remount,rw /dev/hda4  /
then the root filesystem if remounted as read/write

Anyway the stupid thing is that if I boot with my old kernel I don't get 
this problem !!!
Any Help

My /etc/fstab :

/dev/hda2               /boot           ext2            noauto,noatime 
        1 1
/dev/hda4               /               reiserfs 
defaults,noatime,notail,iocharset=utf8          0 0
/dev/hda3               none            swap            sw 
        0 0
/dev/hda1       /mnt/win        ntfs 
auto,ro,umask=000,iocharset=utf0 0
/dev/cdroms/cdrom0      /mnt/cdrom      iso9660 
noauto,ro,umask=000,iocharset=utf8      0 0
/dev/fd0        /mnt/floppy     vfat 
noauto,defaults,umask=000,iocharset=utf8        0 0
none                    /proc           proc            defaults 
        0 0
none                    /dev/shm        tmpfs           defaults 
        0 0

My /etc/lilo.conf :
image = /boot/kernel-2.4.22
         root = /dev/hda4
         label = Gentoo
         initrd=/boot/initrd-2.4.22
         append="root=/dev/hda4 init=/linuxrc hdc=ide-scsi"

image = /boot/kernel-2.4.20-gentoo-r5
         root = /dev/hda4
         #root = /devices/discs/disc0/part3
         label = Old-Gentoo
         initrd=/boot/initrd-2.4.20-gentoo-r5
         #read-only # read-only for checking
         append="root=/dev/hda4 init=/linuxrc hdc=ide-scsi"
 


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