Unity 3.5.6 Invalide License File

Hi,
I installed Unity 3.5.6 on my pc And when I try to manually activate it reading the license downloaded from Unity Technologies I got the this popup error :

** Invalid License File **
This file does not contain valid license data and cannot be used

Has anyone got his error and has a solution ?

Thanks

luci1B

Please send your Serial number for Unity & existing .ilf file to support@unity3d.com - We should then be able to determine why your License file is invalid.

Thanks,

Hi,

it is for the free version I has some issue so I do not have any serial number.
I am sending the my .ilf file to support.

Thanks for your answers

luci1B