Has it always been slow, or is that a recent development? At its fastest, the FS-2000 only prints 31 pages per minute, and that's for regular single-sided 8.5" x 11" with no special requirements. Anything else will (thick paper, longer paper, duplexing, etc.) will slow the print speed down.
One thing you can try to speed up the print speed is to change your spool options in the print driver. Go into the print driver (Control Panel > Printers & Faxes, right click on the FS-2000 and select Properties) and find where the spool options are located. Try selecting different spool options (such as waiting to send the job until all the pages have spooled, or sending it page by page) to see if any of them affect printing speed.
There are other options in the print driver's properties which could affect printing speed as well. Look around the different tabs and try changing some of the options to see if they make any difference.
You can also go to Kyocera.com
and download and install the newest version of the print driver, which might speed up processing as well.
Hope that helps!