We can't see your broken code — we can only guess. There are no mind readers here and our crystal balls are cracked.
#property indicator_typeX DRAW_LINE // Bug 1090 must set.
SetIndexStyle(X-1, DRAW_LINE); // Or in OnInit().
Do you really expect an answer? Do you have a smiley face in the upper right? What is in the logs? Are you even logged in? There are no mind readers
here and our crystal balls are cracked.
It looks that some EA's that use old syntax with "start()" function won't run anymore because MT4 recognizes them as scripts.
You have to replace "start()" with "OnTick()" and add "#property strict" directive.
That will probably expose several other problems you'll have to fix.