music stops when screen off

[kobine]

Poweramp version: 2.0.5 build 488

device model: samsung galaxy s2

android version :4.0.3

rom : criskelo v05- XXLPQ

hi,

i press play and the music starts as supposed but when i lock my screen and it turns off the music stops .

i tried to remove and re-install , cleared data and still the same issue .

edit: when i disable the lockscreen buttons it doesn't stop

[maxmp]

Thanks!