Update license message

I have only been using avast! 4 pro for three months…but I just received a notice saying I needed to update the software. I can not find any email address or phone number to ask about this. Does anyone know how to contact someone … or know what this notice means? Thank you.

Did you bought a key for it or are you running it as trial?
Is your system date/time still correct?

Yes to both questions. I bought a one year license in May of this year. Is there no way to contact the company?

See the tutorial: http://www.avast.com/files/tutorials/insert_key.htm
Please take a look here: http://www.avast.com/eng/i_was_successfully_r.html

Is your system date/time correct?
Do you use copy & paste method?
Are you sure you do not include the ‘last blank space’ in the paragraph while copying & pasting?