Speed Hack Can't Move

#define PlayerBase 0x00F16714

void SpeedHack()
{
if(speed)
{

DWORD Speed = *(DWORD*)PlayerBase;
if(!Speed)return;
Speed = *(DWORD*)(Speed+0x1C);
if(!Speed)return;
Speed = *(DWORD*)(Speed+0x10);
if(!Speed)return;
Speed = *(DWORD*)(Speed+0x0);
if(!Speed)return;
Speed = *(DWORD*)(Speed+0x44);
if(!Speed)return;

*(FLOAT*)(Speed + 0x1C) = 1000;

}
}


HELP ME :'V WHATS WRONG WITH MY SOURCE CODE
WHEN I ACTIVE HACKS INGAME CAN'T MOVE / CAN'T WALK / STUCK


GAME : SPECIAL FORCE 1 SEA

Get This Value

if(opt.Item.speed == 1) speedsetvalue=600;
else if(opt.Item.speed == 2) speedsetvalue=800;
else if(opt.Item.speed == 3) speedsetvalue=1200;
else if(opt.Item.speed == 4) speedsetvalue=2000;
else if(opt.Item.speed == 5) speedsetvalue=2500;
else if(opt.Item.speed == 6) speedsetvalue=3500;