any clue on the simple password creation problem.

A staff tree with two servers, first nw6sp5 and a new one nw6.5sp6.

When I create an account from nw6sp5 console one 1.3.5 and set the simple
password. It work fine.
But when I create an account with nw6.5sp6 conesole one 1.3.6f and set the
simple password, I got the error message "error saving the simple password
for(1) to the directory. The returned error code is -1,636
Any clue?