MMC problem : URGENT !!!!!!!!

Hi!
I use Siemens MultiMediaCard memory with S7 300 Siemens PLC.
In order to reduce cost of these memories, I bought standard (non Siemens) memory.
But, I don't succeed to read and write data from the PLC with this memory.
Anybody could help me ?

thank you

Try

http://personal.telefonica.terra.es/web/suwe/

http://www.runmode.com

Hope it helps