lahom 0 Light Poster

hi
i have anew class which my dialogs should be based on it instead of being based on CDialog.
two weeks ago ...when i inserted a new dialog and create a new class for it ..i was able to choose my new class from the drop down list.
but now i inserted a new dialog BUT i couldnot find my class among the base classes....
WHAT IS WRONG????
Iam terribly confused.:icon_confused:
what should i do now???