Incorrect behavior, Missing argument 2 for pay::form()

I have problems configuring the module.
Here is my settings page:
http://pix.am/HUwE.png

but the payment form is rendered on node view, not node creation!
http://pix.am/nSIO.png

I also get an error message:
warning: Missing argument 2 for pay::form(), called in Z:\home\d6\www\sites\all\modules\pay\includes\handlers\pay_form.inc on line 122 and defined in Z:\home\d6\www\sites\all\modules\pay\includes\handlers\pay.inc on line 267.