Job creation failed with error

HI

i have created application set for oracle RAC, but when i try to create the job by right clicking the application set> Create Job

I get mapping Application set window

then I recive following error

May 12, 2011 12:02:59 PM rspora1 030223 ERROR: Internal error - the Application set does not contain the ASM information required for diskgroup mapping

I am not sure what is missing information in application set