interfacing SF1000 flash card with rabbit 4400w


I am having trouble interfacing the SF1000 flash card with our rabbit 4400.
I #use “sflash_fat.lib” and #use “fat.lib”, but when I compile it gives me errors:

ERROR FAT_CONFIG.LIB : Board type does not support FAT filesystem.
ERROR FAT_CONFIG.LIB : You need to define _DRIVER_CUSTOM etc.

The code I am currently using was written using rabbit core 3100 which already had a slot for the SF1000 card. But now I am adapting that code to work on the rabbit 4400 on which I am using portD(4-7) to connect the SF1000 card. Please help me figure out what I need to do(in terms of software) to make this work.