Velocities of all Models(Helicopters, Shells from GE Gun kit,.etc..) are stuck and not wroking

Hi guys, I was trying to create a game but I got a big problem is Velocity from all maps when I created it wasn’t working for Velocity, and player’s character are always stuck when spawning and only moving when they jump out there, it was effected many to the scripts I use, I was finding many ways to fix it but it’s got fine and got worse for my system guns called “FE Gun Kit”, many kind shell of bullets different are stuck and floating on air, it does not drop to down the ground, and more example helicopters from many models are got stuck and can’t move, to the rotor aren’t also not rotating.