Assigning Activity type to WC

Hi ,

Iam having aissue in DIP profile.

I want to determine the material based on Activity type and Work center.

Eg if ACT1 and WC1 means MAT1

     if ACT2 and WC2 means MAT2

I have flag the check box for ACTIVITY type and Workcenter    for material determination in  ODP1 and assigned values in Criteria in the same ODP1 .When I run DP90,system is throughing error message as CHARACTER COMBINATIONS W/O MAT.ASSIGN IN DIP PROFILE XXXXXX.

I think I need to assign the activity type in WC.But my settings in WC are standard value key is SAP0,Capacities OTHER FORMULA SAP008 ,Scheduling OTHER FORMUAL SAP004,In COSTING tab I have given SAP008 in the RHS corner.

How to assign specific Acitivity type to WC.

Regards

KRISHNAN