Rock Band Guitar Doesn't work

There is no preset Guitar config, you need to reassign the keys if they don't match your controller. I have to reassign mines on MMJoystick.
RB1 recognizes a Guitar if the Pad's type is set as Guitar, I tested it recently. You may be trying to use v1.00 of the US version, which won't work since RPCS3's Guitar type is Guitar Hero and the US version only added support for those in the game update.

So what should i do to make it work?