wdr_task=>application not assigned

Hi,

I have developped my first WebDynpro-Application and wantet to test it. But I always get a

dump when calling the URL in the Browser.

The part of the source-code where the problem occurs is:

1 method DO_CLEANUP .

2 >> wdr_task=>application->if_wdr_n

4 * In all cases clear temporary pa

5 if ( action is not initial ).

6 action->clear_parameters( ).

7 endif.

8 IF me->exception_manager IS NOT

9 me->exception_manager->remove

10 me->exception_manager->ignore

11 ENDIF.

12

13 endmethod.

The Object wdr_tast=>application of Object CL_WDR_MAIN_TASK ist empty.

Would be nice when you could help me ...