Will pa_project_pub.update_task update task status?

Hello,

The user cancelled a project task.  Despite the clear message telling them cancelling a task is irreversible, they would like to open the task.  I have run the following script using the pa_project_pub.update_task API, and I get success messages, but the Task Status on the application interface still shows the task status is cancelled.  I assume p_status_code is the parameter for Task Status.  Is there something wrong with my script, or is the Task Status not updatable through the API?

Thank you, Kevin

DECLARE
  vn_msg_count             NUMBER;
  vs_msg_data              VARCHAR2(2000);
  vs_return_status         VARCHAR2(200);