Can't get my flash to fill a table cell

Hi everyone. I’m sure I must be missing a setting somewhere (fairly new to Flash).

I have created a Flash movie with dimensions 456 px wide by 130 high. In my webpage, I have inserted it into a table cell that is 456px wide and 130px high. However, the flash does not fill the table cell: it is too narrow and there is white space to the right of it.

Any idea where I am going wrong? What should the publish settings be?

Thanks,

Shrill