MS Outlook Plug-in dosen't sync calender

MS Outlook Plug-in dosen't sync calender

In the log i get the following error: 
[2012-01-17 10:11:11] - calendarsync started between outlook and supportcenter
[2012-01-17 10:11:11] - reading all new supportcenter calendar
[2012-01-17 10:11:11] - reading all new supportcenter calendar -- successfull
[2012-01-17 10:11:11] - reading all modified supportcenter tasks
[2012-01-17 10:11:11] - reading all deleted supportcenter calendar
[2012-01-17 10:11:11] - reading all new outlook calendar
[2012-01-17 10:11:11] - creating supportcenter calendar
[2012-01-17 10:11:12] - java.lang.numberformatexception: for input string: "2012-01-30"
[2012-01-17 10:11:14] - error while parsing response from supportcenter
[2012-01-17 10:11:14] - creating supportcenter calendar -- successfull
[2012-01-17 10:11:14] - creating supportcenter calendar
[2012-01-17 10:11:15] - java.lang.numberformatexception: for input string: "2012-01-18"

MS Outlook 2010, supportcenter version 7905 with MS SQL database.

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