Document Category not Defaulted when Created AP Invoice

Summary

No Document Category when creating Invoice

Content

Dear Oracle Fusion Fellows, 

Good day.

Need your advice.

I have created new ledger, setup financial for GL and AP.

I have setup Payables Document Sequences & categories, specify ledger choose sequencing by Ledger, 

but when I create invoice, it doesnt defaulted and I cant choose the category that I created.

Kindly advice ...

Thanks in advance,

Diana.