Thanks for the reply, but it doesn't seem to make the difference.
I set loop to yes. Speed is at 0. (I don't actually want to animate it)
I just want to display a different picture on contact.
Frame 0 is black mosquito.
Frame 1 is red mosquito.
When the mosquito touches the hand it should turn red and continue to subtract 1 from the health when still touching.
I set the frame to 1 so it turns red, but it no longer subtracts 1 from the health, except the very first time.