Approve Button

This question needs a lot more information before people can help you. You need to provide information about the rules you have created for the button.  What does it do?  What is it supposed to do? What does it look like?

Based on your recent questions, I highly recommend taking the product training available on Nintex University. Training will help you answer questions like this.  It will enable you to understand how things work and how you can build complete applications without writing code. A little time on training will be well spent and provide benefits for the future.

Ok Thank you very much