my indicator works but my ex4 file not working

Dear sir,

I had developed an indicator using object create and object set ( that is INDICATOR WITH BUY AND SELL ARROW ) , my indicator works fine after compile i got the ex4 file but the ex4 not is working ( i had copied the ex4  file to the expert directory , i had also check that "allow live trading " is on , every thing is fine but my expert advisor file is not work why ,?  same indicator file is working but the ex4 file generated from the indicator is not working , please explain why

please note : i am running mt4 in demo mode now  

sorry for my bad English

Thankyou