[delphi] ReadStream - AccessViolation

Napisal sem program(client), ki serverju poslje ukaz in dobi odgovor. Problem imam z branjem streama. Ko pride do ReadStream mi javi napako: Access violation at adrress 0041EE19 in module Avtorizacija.exe. Read of address 00000000.
Koda:
with IdTCPClient do
begin
outputStream:=TStringStream.Create(strKomanda);
try
WriteStream(outputStream);
ReadStream(inputStream, -1, FALSE);
finally
FreeAndNil(outputStream);
FreeAndNil(inputStream);
end;
end;

Ce naredim tako:
with IdTCPClient do
begin
outputStream:=TStringStream.Create(strKomanda);
inputStream := TStringStream.Create('');
try
//WriteLn(strKomanda);
WriteStream(outputStream);
ReadStream(inputStream, -1, FALSE);
finally
FreeAndNil(outputStream);
FreeAndNil(inputStream);
end;
end;
pa mi javi napako: Project Avtorizacija.exe raised exception classEOutOfMemory whit message 'Out of memory'.

Kje je problem? Hvala!