Karen,

Two possible reasons for your error message.

1) Have you replied to the confirmation email (there is a link to click)? The system needs a one-time confirmation in order to allow the votes to count (according to their website, it keeps track of your votes but doesn't count them until you've replied to the confirmation email).

2) If you've already done the above but still get the error, then you may want to check your cookie settings: You can either simply allow both regular and third party cookies, or try allowing cookies from the following two sites: monsanto.com and paradowski.com (the advertising company that administers the contest-specific part of the website). Cookies from googleapis.com also needs to be allowed, but most people have those allowed anyway, since many, many sites use googleapis.com cookies. However you set things, I'd recommend that you tell your browser to delete all cookies whenever you exit the browser, but that's a general rule that I follow, having nothing to do with the contest.

Once you get things working, you'll get an onscreen confirmation each time you vote (or be told that you voted already that day).

Hopefully this will get things working, let me know if it does or not. Either way, thanks for the effort!