Packet error

[Rzulf]

So I have this error
boterror.png
when using this packet

procedure EatMeat;
var
PacketBuffer: array [0..200] of byte;
ProcessID: Cardinal;
begin
GetWindowThreadProcessId(FindWindow(okno,Nil), @ProcessID);
PacketBuffer[0] := $0A;
PacketBuffer[1] := $00;
PacketBuffer[2] := $82;
PacketBuffer[3] := $FF;
PacketBuffer[4] := $FF;
PacketBuffer[5] := $00;
PacketBuffer[6] := $00;
PacketBuffer[7] := $00;
PacketBuffer[8] := $F9;
PacketBuffer[9] := $0D;
PacketBuffer[10] := $00;
PacketBuffer[11] := $00;
SendPacket(ProcessID, @PacketBuffer, TRUE, FALSE);
end;

It works when I use it by clicking button, but when I use it in timer this error appears.
How can I fix it?

[szulak]

This error is pretty self-explanatory. You're reading from incorrect memory address.

[Rzulf]

I don`t read anything

[Blues]

Peak bp on SendPacket()