Super smash bros brawl and melee double tap dash problem

[Nitrox903]

Hi guys

I got a problem related to controls, i was trying to play super smash bros brawl and melee but everytime i move
it always dashes and counts as a double tap, i cant walk, i tried using the keyboard and my controller as a gamecube controller and wii classic controller
but it didnt work, i cant walk normally so it wasnt my controller or keyboard's fault,
please help ive tried tweaking the settings in the controller option and the one in the key mapping and it still doesnt work
and yes i have disabled and put the wii controller options to none when i played brawl and melee

my current version of dolphin is 4.0 i have tried many versions but the problem still exist

please help me out and thank you