Navigation locking up

I'm using Lectora 2005 with SP3a installed. When I post my course to our LMS (Oracle iLearning) I'm having issues where clicking the next (or back) button while external media (flash files) is still loading totally locks up the next and back buttons and they no longer function. Is there a way to hide, or deactivate these buttons until the media is fully loaded? I have no problems with the buttons locking up after the media is fully loaded.Thanks in advance!

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