I am trying to use selenium web driver with the driver.FindElementById"retrieve\_button" in an html page, but the command could not find the element and keep giving me error. I have attached the html code in the image and the element I'm trying to find is the input element at the end of the code in the image. 

Any help would be very much appreciated.

[![enter image description here](https://i.stack.imgur.com/Z0jou.jpg)](https://i.stack.imgur.com/Z0jou.jpg)