Can't add a Recurring Event

Hi there. Have inherited a Joomla! site, and the Scheduler was busted - calendar page was showing and appeared to have a recurring event. But the Admin page was completely blank - no way to add a new event at all. And clicking the event in the front-end calendar was popping up a weird alert, asking if I wanted to edit all occurrences of the event, even though I wasn’t logged in at all.
So, I uninstalled the Scheduler component, then manually deleted the events_rec and scheduler_options tables from the db so that the installer would add them back in properly.
I then re-installed it by linking directly to the file here:

dhtmlx.com/docs/download/joomla_com_scheduler.zip

so hopefully that should be the latest version?
I then re-linked the menu item to the component, and the calendar showed up on the front-end with the default “Was installed” event showing. Went to the Admin page and I see all of the correct tabs. The “Repeat events” checkbox was already checked as part of the defaults.
When I click the “Events Administration” tab and click the “Add” button, a new event is added to the list. I can then edit each part of the event directly in the listing.
BUT, I do not see any sort of pop-up as displayed in the documentation, and no way to specify a recurring pattern for that event.

Is there something that I’m completely missing? Does the Scheduler require some other part of the DHTMLX family to be installed separately? Or some other Joomla! component? Was there another db table that I should have deleted so that it would be added as part of the install process? Or what else could be causing this? Ack!
Thanks.

SPECS:
Joomla! version 1.5.23
PHP version 5.2.17
Scheduler (as listed in Extension Manager): version 3.0, dated 2009-12 (again, as per the direct link specified above).

Hi,
Events administrator doesn’t provide facilities for editing recurring events.
You may configure them only at front-end.

Ah, that would be that I’m missing something then!
Unfortunately, the rub is - they want me to remove the “Login” component from the front end. Guess will have to see if they can remember the URL to the login page, or find a way to put a hidden link in there somewhere.
BTW, it all appears to work from the front-end, but would like to suggest that a non-logged-in user should not see the “All-day” checkbox and that the “Cancel” button should be replaced with a “Close” button. The word “Cancel” only makes sense if you are an Admin-type and you can Save or Cancel the entry. Whereas a regular end user wants to Close the box.
Thanks for the reply.

Hi,
you may add into scheduler_include.html file the follow code:

<script>
scheduler.attachEvent("onBeforeLightbox", function (event_id){
    if (scheduler.config.readonly_form)
        scheduler.locale.labels.dhx_cancel_btn="Close";
    else
        scheduler.locale.labels.dhx_cancel_btn="Cancel";
    return true;
});
</script>