Invalid Credentials after migration to 2.1.x

["Walter Vendraminetto" <lists@zonatex.net>]

Hi,
 I'm migrating users from 2.0.27 to 2.1.17.

PROBLEM: users are not authenticated anymore (err
Is there a known reason ?
I use PERL to create passwords:
   
      my $random rand 64, rand 64, rand 64, rand 64, rand 64, rand 64, rand 64];
      my $bsalt       my $esalt       my $modsalt       my $crypt_pass 
and the password is {CRYPT}$crypt_pass.
This works fine with OL 2.0.27.
Is there any reason why this may not work in 2.1.x ?

Thank You to anyone willing to help.

Regards
walter