Turning PerlFreshRestart Off breaks app

I am currently trying to migrate an old web app from perl 5.6.2 to perl
5.8.8
One of the reasons for this is so I can use Moose.
I discovered that I couldnt preload Moose classes when PerlFreshRestart
was set to On

Unfortuantely after turning this to off, I can preload Moose classes in
my startup.pl without any problems
but in the old app code I start to get errors about not being able to
load methods
eg Can't locate object method "new" via package "App::UserManager"

The package App::UserManager does have a new method and it all runs ok
with PerlFreshRestart On
All the old app modules are preloaded in startup.pl

If I turn PerlFreshRestart Off using perl 5.6.2 this problem does not occur.

can anyone give me any suggestions what I should look at to try and fix
this problem

Server version: Apache/1.3.37 (Unix)
Running on Centos
Apache/mod_perl/perl were all built from source

Thanks
Mike

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