i am using Unreal engine 4.14 and every time i press W it Does work but it goes forth and backward it’s so weird i have read some questions about it they say that u should enable root motion i did enable it and it did not work and i even forced it to enable but it still didn’t work so if you guys could tell me another solution i’d appreciate it and thanks 
Can you go into further detail what the probem is? So far I don’t understand the issue.