There is nothing else I can really suggest here except to keep physically checking your iponline table here.
The query is correct. The code definately works as seen on the examples I posted.
who's online will update as long as you have the onlinepal selected to view and to display number of viewers as posted above.
Content visible to verified customers only.
For quick reference our site is showing who's online as well here http://www.photopost.com/photopost/index.php