Slimeblock + Sticky Piston not working

what exactly did you do? how did you built it?
I can't tell why it isn't working if you only say you have a sticky piston and a slimeball... D;

Slime ball or slime block?

@danduu Maybe try uploading the image to imgur because it's not loading for me. A piston should work with a slimeblock as long as it's a slimeblock and not a slimeball.