islidex plugin does not show the images

hello,

i have installed this pluging a couple day ago. it worked well for me except the size of the thumbnails of the slides. i decided to find new plugin and found frontpage slideshow. it is more suitable for me but it has some bug while writing new post. it denies all other functions in post screen so i decided to use islidex again. now it does not show images neither on slide nor on thumbs. what should i do?