Simply removing the card will not solve the problem. As long as the software is still residing on the hard drive, it will load during the start-up procedure and be active while the machine is running. Go to the Extensions folder of OS-9, find the drive for the card, and put it someplace other than the System folder. Do not trash it yet. Then, reboot the machine and try to use the "Sleep" command from the menu. You might want to keep the original software available so you can re-install it and the card at a later time if you find that you actually need it for a job.