Credit Transaction - Application greyed out

Hi All,

A small question.

If we credit and invoice by using create a 'manual credit' we can apply against an invoice and unapply ok if required without problems uing the Account Details/Find/Details/Actions(from toolbar)/ Applications.

If we credit and invoice using the 'Credit Transactions' method rather than using a Manual Credit we cannot then unapply as above.....this is greyed out !

Is there a good reason for this ?

Thanks

Sue