48055 IPB Skin Installation

Need help installing a script. I've already purchase the script. My website has a portal from http://www.ibforen.de. Each time I install the script, it gave me the following error messages. IPB TEMPLATE ERROR: Could not load the required template. First, try and remove any custom skin settings by clicking here Then, please visit your Admin Control Panel to repair this template. Error: load_template(./skin_cache/cacheid_13/[login to view URL]): failed to open stream: No such file or directory Can someone help?