EA trading in demo account

 

I have written a couple of EA'S using  mql5 get a " CTrade::OrderSend: instant buy 1.00 AUDUSD at 0.75029 tp: 0.76029 [trade disabled] I do not understand why I am getting this. I watched several videos doing EA's and when they are running the balance in the demo changes . Please help As you may have guessed I am new to all of this.

 
I (mt4) guess that even the mt5 has a button "AutoTrading" which has either a green (enabled) or a red (disabled) spot and you can change it with ctrl-E - have you tried/checked that?