dialog with combo box

Hi ,
I set a dialog with combo box in the dialogs view.
I have this code in installscript setup.rul:
#define HealthBoardList 17815
#define DLG_LIST_ID 10110
nResult = EzDefineDialog(eran,"","",10110);

szDlg = "DLG_LIST";
listHealthBoards = ListCreate(STRINGLIST);

ListAddString(listHealthBoards, "AYRSHIRE & ARRAN", AFTER);
ListAddString(listHealthBoards, "BORDERS", AFTER);
ListAddString(listHealthBoards, "DUMFRIES & GALLOWAY", AFTER);
ListAddString(listHealthBoards, "FIFE", AFTER);

CtrlSetList (szDlg, HealthBoardList, listHealthBoards);

DLG_LIST:


I can't undestand why I don't see it when I'm runing the installation?