Downloaded 60 day trial version of LiveCycle ES4 but cannot complete install; requires a serial number that I can not find for trial version

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I am an adobe user for our schools.  I wanted to try LiveCycle ES4 to create forms.  Through Adobe, I found a trial version for 60 days.  I downloaded the file, unzipped it, and began the install process.  The install process requires a serial number, Does anyone have the temporary serial number so that I can proceed?  Thank you.  Patricia Thomas