Pootle memory translation don't work

l10n
#1

Hi all.
We work on Venetian language localization. From some time we notice that
suggestion of translation don't work: we insert strings translated but
Pootle, afterward, don't suggest strings inserted.
In addition, after the last important update applied in november, memory
translation was totally reset. Is it possible to totally regenerate memory
translation and fix the problem of Pootle that can't remember inserted
translation?
Thank's.