Credit status-not approved

Hi Gurus,

I have a sales document which is delivered and billed completely.

But in the staus at header level shows that the credit status is not approved.

In VA02 Environment --changes, I see that the sastic credit block was changed by the user.

My question is how can the Credit status be not approved, when the document is totally billed.And moreover how is the credit status appears as not approved?

Looking for your support.

Montee