Reg. User Exits for IA01 IA02 IA03 IA04 IA05 IA06

hi,

Can anyone tell me if there are is exit which will trigger in transactions IA01,IA02,IA03,IA04,IA06 ,when material components are entered for a task list that is created/selected and operation created/selected.I have got an exit EXIT_SAPLCI20_001 but it is not triggering at the components level only . its triggering even before material components are selected and screen with materials is displayed.Is a there a better EXIT than this one which only triggers for materila components in all the above transactions.

Thanks

Sujana