Images within gallery loads as link to image and not the preview page

Hi,

I have a client who uses the imStore plugin.

He hasn’t had a problem until now. He adds a new secure gallery and adds the images for them. When a client clicks on the image it is suppose to load up like it does on the secure gallery on xparkmedia but now the images loads as …/wp-content/plugins/image-store/image.php?…

I have removed the plugin and re installed the plugin and checked previous albums and they have also been affected the same way.

How can this be rectified as this is affecting his business and he depends on the business from the site.

Any and all help would be appreciated.

Thanks,
Stephen