Whenever you see this in the code:

if ($Context->Session->UserID > 0) {
...
}

That's a condition to eliminate guests. Get rid of that "if" statement. If the clause is a "if ... else ...", get rid of the "if" condition, and then get rid of everything under the "else".

Are you following me?

I was trying to point you in right direction without actually looking at the extension... Umm, in WhosOnline, at lines 149 & 150, you see:

if (in_array($Context->SelfUrl, array("account.php", "categories.php", "comments.php", "index.php", "post.php", "search.php", "settings.php"))
&& $Context->Session->UserID > 0 && !$Context->Session->User->Preference("HideWhosOnline")) {

That "$Context->Session->UserID > 0" condition is what's keeping guests from seeing the WhosOnline Panel (I believe)... Now that I look at it, it's not quite as simple as erasing the condition (because there's a preference involved). You would probably need to change it to:

if (in_array($Context->SelfUrl, array("account.php", "categories.php", "comments.php", "index.php", "post.php", "search.php", "settings.php"))
&& !($Context->Session->UserID > 0 && $Context->Session->User->Preference("HideWhosOnline"))) {

Note the NOT operator ("!") and the parenthesis. Try that out. It might work, or it might not. If it doesn't, I would have to look deeper at the code to see what else is going on.

sweet it worked
thanxz