Hi,
These are the clear steps to set rule for button:
a. Double click the ‘Submit’ button.
b. Click on ‘Rules’ then add a rule.
c. Add a condition.
d. Select ‘Submit Using a Data Connection’ for the action.
e. For ‘Data Connection’ add and give the URL up to the form library.
f. Click ‘Ok’ for all the windows.
Do this you will find the form in the SharePoint where you have Submitted.make sure to check the form in the form library to which you have taken the connections.