Hello.

I believe that I already answered you via e-mail, so just for another - Free edition has specific limitations, as you can see here: http://www.kentico.com/cms-asp-net-features/Feature-Matrix.aspx. You can delete objects which exceeded license limitation, or send an e-mail to support@kentico.com with request for the trial license key of the same edition, which you are using on your development machine.

Best Regards,
Radek Macalik