html code within concrete

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hi,
i tried to add a video player by using the object class. i uploaded all the neccessary files to my webserver and added html to the main area.

in the edit mode it works fine. also when i publish my editings. but as soon as i navigate to another page e.g. home and go back then to the "video gallery" by using the link in the main navigation the player doesnt show up anymore.

Ans suggestions what can cause this?

alemao