Hello there,
Welcome to Adobe Forums!
Can you please tell me which operating system is it?
Please make sure, that Captivate 6 complete version should be 6.0.1.240 or 6.1.0.319 (Help > About Adobe Captivate).
Do ou get any error Message while publishing to .swf?
Is this issue on a specific project or any new project as well?
Thanks.