Mediascanner is not working

Currently I am using a Samsung galaxy note-2 with custom ROM (slimkat 4.4.2.built 4 official). Since the last few days my media scanner is not working properly for some time. Sometimes after restarting it works fine, but not always. I already tried few media scanner apps from Google Play Store but when I run those apps, they crash. It scans only my phone content not my SD-card, while using phone browser I can access the card contents. But my gallery and music players are not able to scan SD card media. Does anybody have a solution for that? Or do I have to wait for slimkat net update?