[imp] Mysql + Identities don't work

[Rodrigo Ruiz]

Hi,
i have two horde systems installed on differents servers, one work over
postgres (don't have troubles, working perfectly) and other over mysql.
Last have troubles with identities, when i try to set my default
identity, changes are not saved on mysql. I have been looking for the
error into logs of horde, mysql and apache but nothing look wrong.
Could someone give a hand please, thanks.