Attribute not found in WD Controller error

Friends,

I created a WDA component ZVXL4_SELECT. I created a view called "MAIN" and created an attribute "M_HANDLER" of associated type "IF_WD_SELECT_OPTIONS" in the attribute tab of the view "MAIN".

when i double click on the M_HANDLER attribute, i get the error message

"Attribute IF_MAIN->M_HANDLER was not found in Web Dynpro View/Controller ZVXL4_SELECT".

Points will be rewarded for helpful answers.

Thanks.