Gamepad problem (stuck D-Pad buttons)

[RedFlame]

I'm Korean, so my english is bad
I use PPSSPP v0.8.1-1116 on Galaxy S3 3G, Android 4.1.2.
I have a gamepad for PC by USB, but it walk on PS3 & my Galaxy S3.
Other Android emulator program(ePSXe, SNESoid, ETC.) can use my gamepad, but...
I can use my gamepad on PPSSPP too, but it has one problem.When I press D-pad Right(X-axis +) or D-pad Down(Y-axis +), then this buttons are locked up until press D-pad Left(X-axis -) or D-pad Up(Y-axis -). so, I can't play game...T_T Other buttons work very well, but just D-pad axis+ has ploblem. Please help me.