Today i just logged to battle.net and found this http://img11.imageshack.us/img11/2043/60654159.jpg , but when i connect in sc2 battle net says that i haven't sc2 beta license. No email too :(

Just contact our support via the webform:
http://eu.blizzard.com/support/webform.xml

They will be able to assist you with any problems. My first idea would also have been, that you should make sure to download your client via the account management and make sure to use that client. About posting in the beta forums: You will have to log into StarCraft II and create your profile in game first, so you can select that profile to post with.