(Xmodem ) "Modem command state not present" problem

[mr_fahrrad]

Delphi-Quellcode:

xModem1.OpenDevice;
xModem1.EntercommandState;

I got the error: "Modem command state not present"

how I fix this?

I'm using a gsm modem

[mr_fahrrad]

A change de FlowControl property from fcNone to fcDtrDsr and the problem has fixed...

BUT now I cant get the response of command. I send a command and the state is forever msATSent ... forever waiting a response for modem

code:

Delphi-Quellcode:

   xModem1.OpenDevice;
   xModem1.EntercommandState;
   xmodem1.SendCommand('ATDT1234');
   showMessage('before start wait');
   at:=xmodem1.WaitForAT(0);
   showMessage('after wait'); //NEVER execute code at this point. apear that never get a response for modem
   xmodem1.exitcommandstate; 
   xmodem1.closedevice;

anybody have an idea?