unable to sync calender

Hi All,

I am trying to sync ThunderBird calender with funambol. Below are some 
error logs.

Jan 15 18:06:00 localhost HORDE: [horde] PHP ERROR: Undefined variable: 
suid [pid 25030 on line 377 of 
"/usr/share/pear/Horde/SyncMl/Backend/Horde.php"]
Jan 15 18:06:00 localhost HORDE: [horde] PHP ERROR: Undefined variable: 
suid [pid 25030 on line 392 of 
"/usr/share/pear/Horde/SyncMl/Backend/Horde.php"]
Jan 15 18:06:01 localhost HORDE: [horde] Finished sync of database card. 
Failures: 0; changes from client (Add, Replace, Delete, AddReplaces): 0, 
0, 0, 0; changes from server (Add, Replace, Delete): 0, 0, 0 [pid 25032 
on line 512 of "/usr/share/pear/Horde/SyncMl/ContentHandler.php"]
Jan 15 18:06:01 localhost HORDE: [horde] Finished sync of database 
event. Failures: 1; changes from client (Add, Replace, Delete, 
AddReplaces): 1, 0, 0, 0; changes from server (Add, Replace, Delete): 0, 
0, 0 [pid 25032 on line 512 of 
"/usr/share/pear/Horde/SyncMl/ContentHandler.php"]
Jan 15 18:06:01 localhost HORDE: [horde] Finished sync of database task. 
Failures: 0; changes from client (Add, Replace, Delete, AddReplaces): 0, 
0, 0, 0; changes from server (Add, Replace, Delete): 0, 0, 0 [pid 25032 
on line 512 of "/usr/share/pear/Horde/SyncMl/ContentHandler.php"]

exception 'Kronolith_Exception' with message 'There was an error 
importing the iCalendar data.' in 
/var/www/html/horde/kronolith/lib/Api.php:640\nStack trace:\n#0 
[internal function]: Kronolith_Api->import('?', 'text/calendar', 
NULL)\n#1 /usr/share/pear/Horde/Registry.php(1020):