Injector for nostale [vb.net]

[Limoo]

Hello
I'm creating an automatic injector for Nostale, I found, on the internet, these codes to inject the dll files.
It doesn't work, do you know why?
Is it possible that Nostale has some security to neutralize?

    Private Sub Inject()
        On Error GoTo 1
        InjectTimer.Stop()
        Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
        TargetProcessHandle = OpenProcess(PROCESS_CREATE_THREAD Or PROCESS_VM_OPERATION Or PROCESS_VM_WRITE, False, TargetProcess(0).Id)
        pszLibFileRemote = OpenFileDialog1.FileName
        pfnStartAddr = GetProcAddress(GetModuleHandle("Kernel32"), "LoadLibraryA")
        TargetBufferSize = 1 + Len(pszLibFileRemote)
        Dim Rtn As Integer
        Dim LoadLibParamAdr As Integer
        LoadLibParamAdr = VirtualAllocEx(TargetProcessHandle, 0, TargetBufferSize, MEM_COMMIT, PAGE_READWRITE)
        Rtn = WriteProcessMemory(TargetProcessHandle, LoadLibParamAdr, pszLibFileRemote, TargetBufferSize, 0)
        CreateRemoteThread(TargetProcessHandle, 0, 0, pfnStartAddr, LoadLibParamAdr, 0, 0)
        CloseHandle(TargetProcessHandle)
        Exit Sub
1:      MsgBox("Error. your dll was not injected into" & " " & TextBox1.Text, MsgBoxStyle.OkOnly, "Error")
        Application.Restart()
    End Sub