Presenter 09 published presentation navigation bar stalled+firefox

Hi All,

I have a problem with presenter 09 and blackboard, I searched the support site and the forum and still could not find the solution yet, I am getting reallyI frustrated, and I dont know if the problem is with presenter or blackboard.

I created a PPT,  published it (web) and uploaded to blackboard 09 CMS. The published presentation plays no problem on IE 8/9, but the navigation bar stalls on some of the slices on firefox. As you can see from the screenshot below,  the content of some slides stall for a bit despite it shows "playing" on the navigation bar. The content will show eventually, but it may pause for seconds or even minutes.

The content includes some objects which I do group and copy and paste back as an image. I have some animation functions added as well.

I have tried to publish to LMS, put as much content as possible to the master slides, but the problem is still there.

Sorry I cant provide a link becuause of the confidentiality of the content.

I have to get the course ready soon for the begining of September, and I still CAN NOT sort the problem. Could any of you please help me?? Any suggestions or help will be really appreciated.

Thanks very much in advance.

Christine