chroot diff. errors?

[Mehdi _1]

Hi;

Sometimes the command chroot does not work, for instance ,earlier the same 
command (below) worked in the same directory!
But now I get these:

address@hidden:disk>chroot .
/bin/bash: error while loading shared libraries: libncurses.so.5: cannot open 
shared object file: No such file or directory

address@hidden:disk>pwd
/media/disk

Then I thought may be since I was running rsync it gave the above error, I 
exited rsync then:

address@hidden:disk>chroot .
chroot: cannot run command `/bin/bash': Exec format error

I checked /bin and bash exists (dates in March 2nd 2009/ no changes))

The /media/disk is a hard drive not on obtical but I changed directories anyway 
but then I get this other error:

address@hidden:xen>chroot /mnt/xen/
chroot: cannot run command `/bin/bash': No such file or directory
address@hidden:xen>pwd
/mnt/xen

address@hidden:xen>ls /bin/bash -l
-rwxr-xr-x 1 root root 729040 2009-03-02 14:22 /bin/bash


Sorry for the long email, I am not looking for answer or reply, it is probably 
something I am running/doing?!
Though as I said the chroot worked earlier today on the same machine!?

Thank You Very Much!

Mehdi B.

Oh.. BTW I forgot:
uname -a
Linux Ubuntu9 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 
i686 GNU/Linux

address@hidden:disk>lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 9.04
Release:    9.04
Codename:    jaunty

Best Regards;

Mehdi Bagheri

Austin Texas USA
Southampton England (UK)



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