Unable to upload/exchange images within the demo-portfolio template

Hello,

i am not able to place images into galleries oder slideshows. i can upload them from my harddisc but whenever i select the pictures and press the INSERT Button… no pictures have been updated. i have imported the demo-files and tried to change the portfolio-demo pictures and also tried to add new galleries containing my own pictures.

I also checked the plugins. Still having problems.

Thanks in advance,

Nik