TextField without underline

Hi there! I've published a game this weekend (irresistivel.net), and I've received a few e-mails about the underline of the text field that doesn't work.
The problem is that, in the game, the player needs to set his e-mail witch look like this: chips_someone@whatever.com.
So, I need to know if I made something wrong in this screen or if the text field of unity3d doesn't recognize this symbol?

Thanks!

 

I sure wish the instructions were in English. Took me some time to figure out which button even started the game.

Seemed very interesting, yet all I could figure out was to run the chocolate guy around while trying not to get his arm ripped off.

 

The reason that the game aren't in english, is that, the focus of the campaign are the Brasilians. And unfortunately, the great major of the citzens in here doesn't have a clue of english.
But, still I can't solve the underline problem... :cry: