Javascript Conflict

Hello everyone!
How do you do?
I m the new one on this support forum so if i m wrong please forgive me cuz of my poor in English.
I use the theme
http://freethemelayouts.com/blog/index.php?wptheme=DeskSpace
also i use the plug-in
http://wordpress.org/extend/plugins/simple-flash-video/

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My error is javascript conflict error between theme original js and plug-in js. It may be okay when i deactivated this plug-in. But i don’t want to deactivate because i am using this for my flv movies.
Firstly i faced with some of my texts are in wrong places so what gona do for me?
I think those wrong are caused in Mozilla Firefox.
Please give me advices.

With Best Wishes,
CJ