[Plugin: Multiple Post Thumbnails] Nextgen Support failes

Hello! I have a question! After i had activate the support for multiple thumbnails by plugin i go to a post and select: the secondary image. I will select a image from the nextgen gallery. But after i select a galerie and then a image i only get: the first thumbnail to set. theres no link or button to set the choicen image to the secondary image.

When i use the mediathek (the normal from wordpress) the secondary image link is there.

Can anybody help me?

http://ww.wp.xz.cn/extend/plugins/multiple-post-thumbnails/