Action CREA : No action control found

Hi

Created a Vehicle model  and when I execute the VELO transaction I was able to see the Vehicle Model in VELO transaction

but when I try create a Vehicle using the vehcile model ..it says No action control found.

after going through the sap help ..I need to keep in place the action matrix so that the action is triggerred

so pls let me know how to create a action matrixfor the action CREA.

Thanks and Regards

Banu