odd notifications problem

[nlv27]

so when i get texts, or anything that would cause the notification sound to go off, theres no sound/vibration. just the green notification light.

when i turn the moto droid off, and then back on, the sound/vibrate will work for a little while, then after a few minutes it will return to not making any sound/vibration again. none of my settings are set to silent.

any suggestions are very appreciated!