Problems with Class::MOP::Class

Howdy! Not sure if this is the right place to post this, but if I try:

perl -e 'use Class::MOP::Class'

in my system (Ubuntu 11.04) I get:

Can't locate object method "initialize" via package
"Class::MOP::Class" at /usr/local/lib/perl/5.10.1/Class/MOP/Mixin.pm
line 16.
Compilation failed in require at
/usr/local/lib/perl/5.10.1/Class/MOP/MiniTrait.pm line 36.
Compilation failed in require at
/usr/local/lib/perl/5.10.1/Class/MOP/Class.pm line 17.
BEGIN failed--compilation aborted at
/usr/local/lib/perl/5.10.1/Class/MOP/Class.pm line 17.
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.

I believe I've just upgraded it to its newest version (by installing
Moose-2.0203 ), but to no avail.

Any ideas are very welcome.  Thanks in advance!