OK, back to basics: Create a blank presentation with one slide, no captions or preloaders or skins, publish, upload to LMS and confirm whether or not it plays. If yes, start adding objects, beginning with a text animation. Then publish upload to test. Find out whether or not all Captivate objects and trimmings are accepted by your target LMS/webserver combo. If the LMS doesn't go black screen yet, copy a single slide from your problem lessons into this (so far successful) lesson and test. Keep going this way slowly until you can replicate the issue after adding something. I realise this will take a lot of time, but it's the only way I know to find tricky issues like this. If you can replicate the issue at step 1, and it plays OK on you PC locally but not on the LMS, it's got to be something in your LMS settings that is choking on something in your Captivate content. Watch out for the fact that many corporate systems use a lot of proxy caching to save bandwidth. So you may find you're actually looking at old content even though you've updated it. Mark each new iteration with a callout displaying which version you are on so that you can be sure it's not cached. If you replicate at step 2 as soon as you start adding text animations, somehow your patch hasn't taken. But you should still be able to replicate the same issue on your own system if you are on Flash Player 10.2. If you replicate the issue at step 3 or later, there's something in one or more of your slides, possbly corrupted elements, that has caused the issue. Hope this helps.
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