Das habe ich dazu gefunden, hatte das gleiche Problem 
I also tried SmartMedia, but was told by sdisk and sformat to only use sundisk-products. Nice touch 
However, this message, at least, should disappear with Thomas Müller's modified driver described below. Anybody cares to give it a try?
05/2001: Thomas Müller has modified the driver dipssdp.sys to work with (at least some) non-SunDisk cards too. His modified flash-disk driver is named dipssdp1.sys and can be found here. In oder to install this you will also need the original drivers from sundrv.zip. Unpack the file sundrv.zip and run sinstall.bat. This will install the three files dipssdp.sys, sdisk.exe and sformat.exe. You then replace dipssdp.sys with Thomas Müller's modified driver (either rename his driver to dipssdp.sys, or change the config.sys). Once you have rebooted the computer you should be able to use most 5V CF-cards up to 32MB. You need to run
mfg
sdisk a: sformat a: (assuming that the card is in drive a:, the right hand drive - otherwise use b:) in order to prepare a card for use in the Sharp.
