Wilson WV 3409 shin guards

[Klokard]

Hey all. I recently purchased a pair of the Wilson WV 3409 shins to replace my totally worn out Carlucci shins. I had my first dish assignment in 2 weeks last night so I finally got a chance to strap them on. About the bottom of the second I heard the familiar tearing sound that velcro gives off when it is seperating. The entire knee assembly was now apart and flopping. I reattached and snugged the velcro pieces together only to have it happen again 2 innings later. Help me out here, what's the trick to keeping these shins together? Thanks.