64-bit chrooting?

Hi,

I'm trying to build a uclibc system using the Gentoo tarballs on my amd64 machine. When I try to chroot into it ("linux32 chroot /mnt/gentoo /bin/bash") I show up as "I have no name@localhost" with a user id of 2^32 or so. There's no change if I don't use linux32 for the chroot.

I can't find anything on the web about this problem. Is this approach possible with a uclibc chroot? Or do I have to build it from a 32-bit system?

Thanks,

Peter Ebden