You need to install libtunepimp. Search for libtunepimp in gslapt, right-click on it, click install, click execute.
It should have been fetched automatically when installing amarok.
Did you install amarok with gslapt? Did it give you any dependency errors?
If libtunepimp IS installed, then amarok isn't able to get that file, and we need some other solution. But for now, try this.