Help me for Flash IDE problem

Am having a problem with my flash… When creating a ‘new Symbol’, it shows a pop up message “Parameter is incorrect”. (Also, when creating MovieClip, when clicking on ‘Export to actionscript’, the base class field is empty… I think it was flash.Display.MoviClip by default.).

I thought the settings got changed… so i reinstalled my flash…

But still the same problem…

Please help me…