a!docExtractionResult() Smart service

i configured all the node inputs of a!docExtractionResult() smart service properly. i used this smart service in process model.

i assigned that task to application administrators group.

when i run this process model, i got this error message "The document extraction instance [docExtractionId=8,545] does not exist, has been deleted, or you do not have sufficient privileges to access its data. Please submit this task to complete. You will be prompted with an error message upon submission."

But, the document is there with the specified id(8545) and also i am having the required previleges as iam  in application adminstrators group.

Please provide me some info regarding this.

Thanks in Advance.