og messaging app

[needadroid]

My droid HD ignores certain messages. I have the flash app that flashes when I get a message but sometimes that's the only way I know I get the message, there's no notification or vibration. Once I go into the messaging app that's when I see I got a text.
Or ppl send me a message but I never get it, there's no notification or vibration idr anything. It's really frustrating!! Should I use a different messaging app or what????