nand write problem

[Jonas]

Hi list,

I try to write some files within linux to my flash. But I always get the 
message
nand_write_ecc: Attempt to write not page aligned data
cp: Write Error: Invalid argument

This is my environment:
linux kernel 2.6.11
mtd-snapshot-20050524.tar.bz2
NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 
3,3V 8-bit)

What I'm doing wrong?

Thanks for your help.
Jonas