The course may have been prevented from launching due to a pop-up blocker.

Google toolbar

Click the pop-up blocker button on the Google toolbar to allow pop-ups from the current site. Hovering over the button provides tooltips with instructions.

Yahoo toolbar

Select pop-up blocker dropdown menu, click "Always Allow Pop-ups From..." to display a list of sites where pop-ups have been blocked. Select site and click "Allow" to add site to whitelist. Note that you can't proactively whitelist a site — Yahoo must have blocked a pop-up from that site before you can whitelist it.

MSN toolbar

Select pop-up blocker dropdown menu, click "Allow Pop-ups For This Site" to whitelist the current site. Click "Pop-up Guard Settings" to manually add URLs to the whitelist or turn on "Allow pop-ups from intranet sites."

Internet Explorer with Microsoft Windows XP SP2

Add site to Trusted domain in Internet Explorer Security settings. Select Tools > Internet Options > Security tab, then choose Trusted sites and click Sites button to add URLs.

Firefox 1.5

Add site to Trusted domain in Firefox Content settings. Select Tools > Options… > Content tab, then click the Allowed Sites button to add URLs.

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