xbox controller analog issue

[el manou]

hi guys, first things first nice job with ppsspp i can finally play MHFU on my phone, such a pleasure!!

i tried recently to play on my pc with an xbox controller because i was tired of the bugs that can occur on a touchscreen due to the humidity, the control mapping went great but the analog stick seems that it can't handle diagonals, my caracter can only go forward, backward, left and right. i tried nearly everything in the analog options but nothing seems to work..

(note: diagonals work but just a little.. not enough to make the caracter move these ways)

any idea? help!! (