In our pending events we seem to have some failed/problematic events, they say "Setting owner on Parent Directory" but never sucessfully run

It is an AD environment and the policy just sets they home folder/quota etc, in the engine log it says this for a particular account 520580

anyone got any ideas ? Also if i look on the file system the account 520580 is the owner of the folder \\TAWE_DFS\Students\0\520580

01 2012-04-17 12:26:51 3600 5 8006 1564 2320 TM: TaskWorkerThread() - Processed Task ID "882C6255AAC92BD443EDD847DA398300", final status = 0.
01 2012-04-17 12:26:51 3600 3 8003 1564 2516 cc::ds_ad::GetObjectListAsyncEx() - Called cc::ds_ad::xADsOpenObject(xDSContext, L"LDAP://\\TAWE_DFS\Students\0\520580", ...), HRESULT = 8007203a, Result = 100.
01 2012-04-17 12:26:51 3600 4 8003 1564 2516 GetObjectInfo() - Called GetObjectList(..., L"", ...), Result = 405528976.
01 2012-04-17 12:26:53 3600 5 8006 1564 3556 TM: AddTask() - Added Task ID "CDC26FE7CDC198218E8A54B829D95EDB", Result = 0, Task Data = "<Command>102007</Command><TOKEN>B6DB461715EE9DED5336AF616506389C</TOKEN><AllProperties>0</AllProperties><TransactionOffset>0</TransactionOffset><TransactionCount>5000</TransactionCount><SqlFilter>NOT (next_eligible_time >= ?)</SqlFilter><SqlParm>1334665614</SqlParm><OrderBy>next_eligible_time ASC, object_fdn ASC</OrderBy><NavState>3</NavState>".
01 2012-04-17 12:26:53 3600 5 8006 1564 3128 TM: TaskWorkerThread() - Processed Task ID "CDC26FE7CDC198218E8A54B829D95EDB", final status = 0.
01 2012-04-17 12:26:54 3600 5 8006 1564 4000 TM: AddTask() - Added Task ID "F37A1F0A90E940FED199E79A43B6A8D5", Result = 0, Task Data = "<Command>102007</Command><TOKEN>B6DB461715EE9DED5336AF616506389C</TOKEN><AllProperties>0</AllProperties><TransactionOffset>0</TransactionOffset><TransactionCount>5000</TransactionCount><SqlFilter>NOT (next_eligible_time >= ?)</SqlFilter><SqlParm>1334665615</SqlParm><OrderBy>next_eligible_time ASC, object_fdn ASC</OrderBy><NavState>3</NavState>".
01 2012-04-17 12:26:54 3600 5 8006 1564 4012 TM: TaskWorkerThread() - Processed Task ID "F37A1F0A90E940FED199E79A43B6A8D5", final status = 0.