sustain pedal not working on some piano vsts in logic

Using a KKA49 with Logic Pro, the sustain pedal works fine on many pianos (Kontakt stock, the Gentleman, Spitfire and Soundpaint) but not on Alt piano and two that I recently downloaded from piano book. The incoming midi messages show CC64 127 (down) and 0 (up) but never sustains. Any suggestions? Thanks in advance:-)