How can I assign Producton order type

Dear Expert,

I created one order type(P303) to follow the below t-codes.

OPJH

OPL8

BS02

BS42

But I can not select that order type from t-code:CO82(define number range for orders) to given the order number range on that order, in the bottom of the list in that order it is showing "Not assigned"

How can I assigned that order? Can anybody to tell me?

I did not any t-code for assigned the production order type.

Thanks in advance

Bishnu