STAXX connnected with SWIFT taxii server but no observables feed


Hi at all,
I’ve tried to configure a SWIFT as STAXX nodes, we’ve IP autorized and the userid/pwd to connect legally. STAXX correctly discover the Taxii SWIFT …but when I poll the collection (I’ve tried from 7 to 1365 day of time range) STAXX doesn’t show the feed…tell “Last Poll Observable 0” (ZERO) …it’s not possible !!! any Idea ??? thanks in advance…maybe SWIFT Taxii Server doesn’t support STAXX…