Why is my second mounted tom drum metal under a strange noise?

I have all the screws tight on the inside tom of the pin pitch has not been published or mounting arms. the hype is just as good, but when I click on the edge of the tom drum, a strange sound of metal against metal vibration ... I can not find what you are vibrating.

Pins are in the spring, one or more in May be loose. You should be able to isolate the one that plays in each ear. When found, remove the stem of tension, then remove the tab. If the spring came off, just put again if in some drummers packing each ear with cotton balls to minimize the noise of spring. If none of this is the problem, make sure the heads are sitting around the tire and the rim, it could be.

Tom Drum