Welcome to the forums
So do it have flowers on look like dead wood
So do it have flowers early in the spring only
or do it have flowers early summer and a few late summer and if you cut it back one spring.. it only got a few flowers late summer`?
Clems are in 3 different groups
Spring flowering... most of them get BIG, no pruning needed and if pruned it have to be after the flower periode
Early 2 times flowering.. early summer and fall, hardly need pruning, most of them slow growing
Late summer flowering.. Jackmani types.- need a hard pruning in the spring and have flowers mid summer
Try this easy one
http://www.clematis.com.pl/wms/wmsg.php/ this page have helped me a lot during the last years - seach for blue.. and do it in English.. find the Brittish flag or you will have to figure out in Polish
or the bigger but more difficult
http://www.clematis.hull.ac.uk/Pia