Please check your settings before activating OCTL2P.
Run the MT4 platform.
On the Tools menu, click Options.
On the Expert Advisors tab, select Allow automated trading and Allow DLL imports check boxes.
To activate the Expert Advisor in the Navigator window, under Expert Advisors, double-click OneClickTradingLevel2 or drag and drop it onto the chart.
In the window that opens, on the Common tab, select Allow live trading and click OK.
If the EA is activated successfully, a smiley will appear at the top right of the chart.