Conditional tags based on templates?

Hello,
maybe someone can give me a hint:
I want to use certain widgets on certain templates using conditional tags.
The conditional tag for the widget is
is_page_template( ‘mytemplate1.php’ )
or for excluding
! is_page_template( ‘mytemplate1.php’ )

Now, I need to hide another widget on this and two other templates and thought the syntax would be
! is_page_template( array( ‘mytemplate1.php’, ‘mytemplate2.php’, ‘mytemplate3.php’ ) )

Doesn’t work.
Where/what is my mistake?

Thanks!

http://ww.wp.xz.cn/plugins/widget-logic/