encoder error

hi i have premiere pro CS4 and i have a problem with encoding… i done editing and when i want to extract my video, the encoder wont work ! its freezing … wt should i do ?
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via Video Editing Forums: Digital Director – Adobe Premiere, Premiere Elements, and After Effects http://www.videoforums.co.uk/adobe-premiere-premiere-elements-after-effects/43469-encoder-error.html