note 20456 added to function.imagepng

i have created an buttonengine, which creates a png grafik if you have choosed some keywords an clicked "create". my probleme ist, thet the output grafic is not colorated an doesn`t have any transparent. in contrast to the source grafics. where is the mistake? what`s wrong whith my code. for what have i pay atention to? thx, for all answers. felix_ P.S. the code (and grafics) can be downloaded at: http://mitglied.lycos.de/msg66/grafik/download.zip -- http://www.php.net/manual/en/function.imagepng.php http://master.php.net/manage/user-notes.php?action=edit+20456 http://master.php.net/manage/user-notes.php?action=delete+20456 http://master.php.net/manage/user-notes.php?action=reject+20456