Problem to add (save) a new event

[Eric Piollet]

1)Mcal is configured, user and passwd created, table Kronolith_events create
in mysql
2)user and passwd added in conf.php

In conf.php when i choose 'mcal' :
I have when i want to save a new event :

Warning: Unable to find stream pointer in
/etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 244
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 247
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 250
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 253
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 292
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 335
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 348
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 363
in /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php on line 64
Warning: Cannot add header information - headers already sent by (output
started at /etc/httpd/htdocs/horde/kronolith/lib/Driver/mcal.php:244) in
/etc/httpd/htdocs/horde/kronolith/addeventaction.php on line 22

In conf.php when i choose 'sql' :
I have when i want to save a new event :

Fatal error: Call to a member function on a non-object in
/etc/httpd/htdocs/horde/kronolith/lib/Driver/sql.php on line 186