cannot acces a new DialogBox

Hi there,

I'm a beginner and am woking on an MFC application, starting from one Dialog I want to create another dialog in whitch I want to display a data in an edit box. But  I can never do it because as soos as I call the new cerated Dialog I hav an assert fail.

this is the code:

this);

"Disconnected"));// here I have the assert

intnRetCode = dlgAddItem.DoModal();

Thank you for your help