The errors mentioned indicate a mismatch between your database & the version of the server you're running. Specifically
Code:
[10.20. - 14:27:30] [RULES__ERROR] Unable to find rule 'TaskSystem:EnableTaskSystem'
[10.20. - 14:27:30] [RULES__ERROR] Unable to interpret rule record for TaskSystem:EnableTaskSystem
[10.20. - 14:27:30] [RULES__ERROR] Unable to find rule 'TaskSystem:PeriodicCheckTimer'
[10.20. - 14:27:30] [RULES__ERROR] Unable to interpret rule record for TaskSystem:PeriodicCheckTimer
[10.20. - 14:27:30] [RULES__ERROR] Unable to find rule 'TaskSystem:RecordCompletedTasks'
[10.20. - 14:27:30] [RULES__ERROR] Unable to interpret rule record for TaskSystem:RecordCompletedTasks
[10.20. - 14:27:30] [RULES__ERROR] Unable to find rule 'TaskSystem:RecordCompletedOptionalActivities'
[10.20. - 14:27:30] [RULES__ERROR] Unable to interpret rule record for TaskSystem:RecordCompletedOptionalActivities
[10.20. - 14:27:30] [RULES__ERROR] Unable to find rule 'TaskSystem:KeepOneRecordPerCompletedTask'
[10.20. - 14:27:30] [RULES__ERROR] Unable to interpret rule record for TaskSystem:KeepOneRecordPerCompletedTask
[10.20. - 14:27:30] [RULES__ERROR] Unable to find rule 'TaskSystem:EnableTaskProximity'
[10.20. - 14:27:30] [RULES__ERROR] Unable to interpret rule record for TaskSystem:EnableTaskProximity
indicates that you have the task system rules, but not the task system rule checks in the rules files in the source, which would have been added in
SVN vs
CVS. Which did you download the source from?