Add Expiration Date To EA's Also Make EA's Work With Specific Account Number

I have 3 EA's I need to add a Expiration Date to. I want to give out demo EA's and have them expire on a certain date. I also want my EA's to work with specific account numbers. The EA should only work with allowed account numbers. The account numbers will be added and deleted from the MQL4 code. Right now I use this function and I get compile errors; 

 void OnTick()

  {

  Comment(TimeLocal());

 string expirytime = "2015.10.1";

     datetime expirytime1 = StrToTime(expirytime);

     if (TimeLocal() >= expirytime1  )

  {

                Comment("Moving Average Is Now Active TRIAL ENDS on Jan 26th");

                Print("Moving Average Is Now Active TRIAL ENDS on Jan 26th");

                }

                else

                {

                Comment("This EA Has Expired Please contact Dave90210@gmail.com");

                Print("Moving Average Expired");

       Comment(TimeLocal());

I need someone to do this while we are both on Skype and TeamViewer. This should be a quick and easy job just copy and paste and make basic edits to code to get it to work.