Erreur when sending mail

Hello,

I have an other problem after upgrading. The mailing function is not correct; i have an error when trying to send the information mail after creating a ticket, activity or updating the status, etc.....

Can you help me?

Thank you

the log error is:

2011-07-31 15:09:24 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'AccessRight' returned more than 1 element
2011-07-31 15:09:24 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'AccessRight' returned more than 1 element
2011-07-31 15:09:24 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'AccessRight' returned more than 1 element
2011-07-31 15:09:24 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'AccessRight' returned more than 1 element
2011-07-31 15:09:24 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'AccessRight' returned more than 1 element
2011-07-31 23:00:03 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'StatusMail' returned more than 1 element
2011-07-31 23:00:03 ***** ERROR ***** Too many rows on StatusMail for element 'Activity' and status 'assigned'
2011-07-31 23:10:31 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'StatusMail' returned more than 1 element
2011-07-31 23:10:31 ***** ERROR ***** Too many rows on StatusMail for element 'Ticket' and status 'assigned'
2011-07-31 23:13:36 ===== TRACE ===== getSingleSqlElementFromCriteria for object 'StatusMail' returned more than 1 element
2011-07-31 23:13:36 ***** ERROR ***** Too many rows on StatusMail for element 'Activity' and status 'assigned'

thanks

Regards