How are you using Sticky. Did you manually enter your login info into Sticky. Which browser are you using. Is the Sticky add-on running and unlocked.
I went to this site without a login. As soon as I entered a username and login and clicked "enter" Sticky offered to store my credentials (I accepted). Then I refreshed the login page and Sticky dutifully entered my data. Pretty straightforward. I did all this in Firefox, FWIW.
If you manually entered your login data into Sticky, I'd suggest you delete that record, and reopen the webpage with Sticky unlocked, running in the background. Then enter the data into the browser fields, and click "enter" and see how Sticky responds.