<SARCASM> Apparently the AmericanXS people feel that the inheritantly unlucky so don't deserve to get a pre-sale pasword so they remove 1/4 of all the registered email addresses before they send out the password</SARCASM>

In all seriousness some people have been unlucky with getting the passwords on time/at all. Since the pre-sale is over now (I think?) your best bet is to get regular tickets as soon as they go on-sale.