MT4 build 610 problem, old EA not working

I use histtraing EA available here http://codebase.mql4.com/6120 to practice my trading over weekends, i prefer this simulator over others for many reasons, one being the option of multiple orders however after built 610, it does not work.

can someone please see what's the issue? and kindly fix it.

The problem is when you upgraded your platform with the old .mq4 file (source code) in the folder. In some cases, the code isn't fully compatible due to new MQ language ... so when the new build tried to compile the old mq4, it failed.

ONLY .ex4 files from the old MT4 folders must be in the new build.

thank Ferru, hence whatS the solution

Copy only the old .ex4 file in the new platform ... or fix the old source code to suit the new MQ language.

unfortunately have no knowledge of programming whatsoever