Office 2003 Activation Problem Microsoft Office Problem?

Microsoft Office problem? - office 2003 activation problem

I can not open my Microsoft documents.When I click on the activation assistant comes and tells me that the process has expired and the product is not key.Under my control panel that you install Microsoft Office Home & Student 2007 Trial and Microsoft Office Standard Edition 2003 (I think) it came in the kit. Someone screwed with him when I was and now I can not program the job, although restoration. Is it necessary to remove or disable a person can work me a few tips to make again? Thank you very much =]