first add a new differant indicator to mt4. does that one install and work properly?
if it does work then perhaps something is wrong with the zup indicator [maybe it does not support the newer mt4 builds or something.
if the new indicator you try DOESNT work then this suggests something is wrong with your mt4. it happened to me a while ago. for some reason ALL new custom indicators stopped working. i couldn’t work out why and tried to fix it to no avail. the only reason it got sorted out was because i decided to switch operating systems [other one was getting old], and when i installed a new mt4 the indicators worked fine.