online plc simulator issue

Do I need a browser plug in of some sort for the simulator to work properly?

Everything appears to work except the program does not work when you hit run. Even if it is a one rung program with 1 input and 1 output.

I checked out the help section to make sure I am not having a syntax problem but it looks just like the tutorials.

Sorry. I can't read. I wasn't hitting enter after editing.