Problem changing Admin password

Not sure if its helpful but clicking the apply button doesn nothing. If I click in the security question answer form and press enter nothing happens on the UI, but last pass pops up and offers to save the info. 

edit:

I got it to change, but Im not certain how. The only thing I did differently that I can come up with was delete the stored lastpass entry for the site. Once I deleted it from lastpass it worked. So maybe the password manager was refilling the old data in the background, but its never done that on any other site when changing passwords so Im not sure. If you have the same problem might be worth a try. Thanks for the reply CrimpOn.