Shogunmark Message threader

For some reason my phone doesn't vibrate when i get text messages when I use Shogun's threaded text.

I've used it for about a month and it vibrated, but now it just stopped and I have no idea why. I uninstall shogun and it vibrates, but reinstall and it doesn't.

I did a hard reset and reinstalled and nothing. Really weird...

Has this happened to anyone before or does anyone know what may be the problem?