Image gallery

Hi, I am using catch evolution pro and the most recent version of Wordpress. Up to now, I used nextgen gallery for displaying images. For some reaseons I would like to change the plugin and work with Robo Gallery. I made some trials with this plugin, but the problem is, that the galleries do not show up at all im posts / pagees (no images ...). It seems to me that there is a conflict with the theme .... What could be the reason for this problem? Do you have any hints? Kind regards Franz