DOS Apps in Windows 9x / Screensavers

I have a dos application running full screen in windows98. I have applied allow screen savers under the misc tab of the pif. however I can not get screen savers to be allowed to kick in over the dos application. When I run the application in a “window” format instead of full screen, and then click on the Maximize icon (full screen compass looking thing) It allows the screen saver to work, however 1/3 of the times that the screen saver gets interrupted I get ghost windows on the task menu, i tried it soley with a MS-DOS prompt icon. Any help would be appreciated. You can email me at craiggee@hardhattech.com