An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll

System.FormatException was unhandled
  HResult=-2146233033
  Message=A cadeia de caracteres de entrada não estava em um formato incorreto.
  Source=mscorlib
  StackTrace:
       em System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
       em System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
       em MediaControl.AudioPlayer.get_Position()
       em MediaControl.AudioPlayer.timer1_Tick(Object sender, EventArgs e)
       em System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
       em System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       em System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       em System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       em System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       em System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       em MyPlayer.frmAudio.Main() na C:\Users\Bruno Soares\Desktop\MyPlayer\frmAudio.vb:linha 0
       em System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       em Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       em System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       em System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       em System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       em System.Threading.ThreadHelper.ThreadStart()
  InnerException: