Files are not getting deleted from the library

When trying to delete the files from the library, error displayed is, "files cannot be deleted from the library" when selecting the option "Delete from Library". The files get deleted when the option "Delete from System" is selected.

OS: Win 8
Browser : Chrome 28

![files cannot be deleted](https://f.cloud.github.com/assets/6617667/2112090/a12200a8-9019-11e3-99c0-138030d495a7.PNG)