"FailedError when adding work log to request - 32 - Time taken to Resolve or Start Time is mandatory field"

Method used: ADD_WORKLOG

XML request to fill worklog: 

<xml><Operation><Details><Worklogs><worklog><description>Closing comment</description><technician>Heather Graham</technician><cost>25</cost><executedtime>23 APR 2013, 01:00:00</executedtime><starttime>22 APR 2013, 01:00:00</starttime><endtime>23 APR 2013,01:00:00</endtime><workHours>24</workHours><workMinutes>0</workMinutes><otherCharge>0</otherCharge></worklog></Worklogs></Details></Operation></xml>

 Can somebody please help me to close this issue.