[Help] Problem with active weapon id.

Hello, I have one question, what's wrong with this code and why always returs id 257 ??

Code:
DWORD hWeapon = Read<DWORD>(BaseAddress + DwActiveWeapon);
int weaponEntId = hWeapon & 0xFFF;
DWORD DwWeaponBase = Read<DWORD>(DwClient + DwEntityList + (weaponEntId - 1) * 0x10);
int WeaponID = Read<int>(DwWeaponBase + DwWeaponId);

return WeaponID;