I installed the last version of this plugin. maybe I pasted something wrong from what you gave me, see for yourself the screen
Yes, I installed the plugin
I think you are missing some steps, the following code should output the time stamp in your forum, if it doesn't then it simply means you are no installing the plugin correctly:
<?=(TIME_NOW)?>
when I pasted this code, it displays a series of numbers. which is what I am doing well