[horde] Can't change personal settings

[s.truppe@email.amergy.com]

 Hi,

i've a small problem with changing my personal settings when i add or want to change the default identity 
the webinterface tells me everything was done fine... but when i want to send an email over imp i just see my default 
identity in the from field. when i go back to the menu where i set the new identity i only see the default one ... 
the only error message i get from SASL is:

May 13 15:06:37 email.amergy.com <debug> saslauthd[14299]: ldap_simple_bind() failed -1 (Can't contact LDAP server).
May 13 15:06:37 email.amergy.com <info> saslauthd[14299]: Retrying authentication
May 13 15:06:37 email.amergy.com <error> saslauthd[14318]: user ldap_search_st() failed: Can't contact LDAP server
May 13 15:06:37 email.amergy.com <info> saslauthd[14318]: Retrying authentication
May 13 15:06:37 email.amergy.com <debug> saslauthd[14299]: Domain/Realm not available.
May 13 15:06:37 email.amergy.com <debug> saslauthd[14299]: Domain/Realm not available

and the apache-errors.log file:

[error] PHP Warning:  ldap_mod_add(): Modify: Strong(er) authentication required in /kolab/lib/php/Horde/Prefs/ldap.php on line 480
[error] PHP Warning:  ldap_mod_add(): Modify: Strong(er) authentication required in /kolab/lib/php/Horde/Prefs/ldap.php on line 480
[error] PHP Warning:  ldap_mod_replace(): Modify: Strong(er) authentication required in /kolab/lib/php/Horde/Prefs/ldap.php on line 488

but i don't realy know if this has something to do with my problem. By the way i'm also not able to get the ldap adress book in turba. 
But i can log in and read and send my emails with imp (so he must has access to ldap because the usernames and passwords are 
also saved there... or). The mysql datatree is working ! I also get allways the 'Last login: Never' text when i log in. Maybe that sasl needs 
some CA keys... but there are a log... from apache and from kolab. i realy have no clue what's wrong.... i hope someone here has 
the time to help me out of this.....


with best regards,
truppe steven