I cant say for sure, several reasons:
1. perhaps the file permission current setting prevent it from being accessed?
2. Perhaps something wrong with the file path?

In any case though, you can try to reupload both modules again. It wont break anything on the site. Make sure you get the latest versions.

If you need help with reuploading the files please read:
http://wiki.rubikintegration.com/zen...u/installation

Im sure you wont need any help tho.

PS: when you reupload files, make sure you do NOT reupload .htaccess file.