[Plugin: AnythingSlider for WordPress] Disable resize content function slides

Hi, how can I disable content resize function? I have slides of different height but I dont’t want plugin make resize.
I’ve already made it happen but using script not wp plugin.
here is an example of desired result:
http://www.progettobenesserecompleto.it

http://ww.wp.xz.cn/extend/plugins/anythingslider-for-wordpress/