Microsoft Office 2003, Activation Code Trial Version Of Microsoft Office 2007... Experiencing Problems?

Trial Version of Microsoft Office 2007... experiencing problems? - microsoft office 2003, activation code

I recently installed the trial version of Microsoft Office 2007. An activation key is to me by e-mail. When I go to the activation key, MS Office 2007 was approaching, but I am not able to write or copy / paste, because it is locked. I have an expired trial version of MS Office 2003 on my computer. Is it interfering with MS Office 2007? When I install MS Office 2007, I will be in a position to a new activation code? Please help.