error code 4109

 
My EA trading on EURUSD or USDCHF can not place orders, it gets error code 4109. But it works well on other pairs. What is the reason? Anyone can help? please.
Thanks
marshall

Why trades are NOT allowed on these two pairs?
 
Check "Allow live trading" button in the common properties tab of your EA
 
Thank you stringo, I have fixed it. thanks a lot.
Marshall
Reason: