Sorry Aharon, I was out of town for some time.
When I open a frame in PS, I saw the full color. However while still experimenting I encountered 2 strange occurance.
1. Some particles actually worked (i.e. I actually succeded in making the particles show full color in AE) however whenever I try to scale up the image (sequence) size (say from 320 X 240 to 640 X 480) in AE the problem retruns. Then,
2. There some other particles especially explosions, some early frames just wont show in color. (e.g. say I exported a 250 TGA sequence from pi3, in AE the first 50 frames exhibit the problem of showing just in white and black, say from 51 upwards show full color).
Thanks