Setup.exe creation in InstallShield

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installer

This is my function to remove the directory after uninstalling. Basically, in my .ism file, there are 2 .rul files(setup.rul and VerGetFileProperty.rul). I have added some code to clean the directory in setup.rul. I build, and one setup.exe is formed. While I run setup.exe, it will ask me to select the db, if I select a db, its says the db server is not found. But if I run the original setup, it will auto detect db server and install. How is the setup.exe getting created? I haven't made any changes on searching for db server part. I have just created a function to remove the directory while uninstalling.

function fnClean()
NUMBER nrv;
begin
if (ExistsDir (INSTALLDIR ^ "OpenTV Account") = EXISTS) then     
    SetDialogTitle(DLG_ASK_YESNO,"Delete Logs");
    nrv = AskYesNo( "Do you want to delete all log files now? Say No if you       prefer delete them later manually.", YES );
    if ( nrv ) then     
        nrv = DeleteDir (INSTALLDIR ^ "OpenTV Account", ALLCONTENTS);    
        DeleteDir (INSTALLDIR, ALLCONTENTS);
    endif;        
else
    DeleteDir (INSTALLDIR, ALLCONTENTS);  
endif;
end;