Cdialog::Create Never comes back

[C++ Programming]

Hi,

I create a derived Cdialog with following code

main_window->progdbg = new CprogDebug();
main_window is main windows I get the pointer to it via AfxGetMainWInd

CMainFrame* main_window = (CMainFrame *) AfxGetMainWnd();

CMainFrame is created on the heap

later on when I try to create the the window modeless dialog it never comes back to me the is that is the create

ret = progdbg->Create(IDD_PROGDBG,(CWnd *)this); if(ret == 0 ) error = GetLastError();