Do you change calling locations ?
Do you work the same birds for a number of days ?
Do you change calls ?
Do you change your calling rythem ?
Do you move around ?
Do you try the silent treatment ?
Do you try to relocate after flydown ?
Do you try leaf scratching instead of calling ?
There are so many things to try and without knowing the way you work the birds its hard to answer your question here. You would be better to read and ask questions on setups and learn different ways to work birds....