I'm using the Nintex Form as the Request Data Task Form, and I imported the list form to the task form, then add the fields for the request data. 

I deleted the save and cancel buttons, then add new button to be "Save and Submit", and "Cancel" button, but after I saved and published the workflow, I added a new item to start the workflow, but for the Request Data Task Form, after I filled in the data and click the ok button, the form closed but the task shows "In Progress", and outcome shows "pending".

I know the different between "save" button with "save and submit" button in the task form, but the "Save and Submit" button doesn't work for my task form.  Is there anything I need to configurate?

Thanks.