Alesis Dm 8 pro bass drum not working

Hey everyone! Just got a Dm8 pro kit for Christmas and have loved everything about it. Unfortunately, while playing tonight I noticed that my bass drum stopped working. I only hear a sound every few kicks. Most of the time I hit it it never makes a sound. I've tried adjusting the sensitivity, different pedals, and different placements. I also opened up the drum and everything was intact. I have no clue what the problem is and I hope someone can help me.
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