When i shoot with this triopo speed light i have to set my camera to A5.6 & S 1/100 & the flash power is 1/4 . 
If i increase the flash power, the picture is black . if i also change any of the shutter speed or Aperture , the picture blurrs . 
Pls i want a simple way to adjust both the flash & camera to any shooting mode i need .
Pls notice i am using a 55-200 lens .

Thanks 
Walid