Complete download and registration instructions for Chief Architect are easy to access and understand.
As the message implies, either the e-mail address, or password, that you are entering is incorrect. Verify spelling and case and if necessary reset your password.
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At this time, there are three different sections of the Chief Architect website you could potentially log in to; My Account, ChiefTalk, and the Support Center.
There are several reasons as to why a log in would fail read this article to be directed to more information on each of the possibilities.
You can use the Online Support Center to contact Chief Architect's Technical Support team and send them your plan files for review.