[SOLVED]problem particle background change color

I have a problem everything is working very well and without changing the code used for particle (I coded another party)
when I use it again.
The background which must be black turns red ...
the color of particle to be become blue violet
but just where is red

did you play with the Alpha/BlendState with differend src and dst functions already?

I found it is not duplicate alphastate

by lowering the number of particles it appears correctly
enfaite and situated next or the object if there are too many particle
a particle does not move and remains permanently display
forcing the system has always view is that idling
its product with 100 particles and not with 40