adsense setup not working - the adsense publisher text box not accepting characters

I've signed up for adsense using the sign up box and have already approved hubpages in my adsense account well over a day ago. When I attempt to enter my publisher ID, unable to enter anything, the entry box is disabled and my adsense account still showing as 'Not Set'. Is there something that I'm doing wrong or an issue with the system? thanks.

placeholder text for bug in Chrome