Analogue-sequencer

I get a Bad Block Error when trying to receive SysEx data, I'm
assuming I have the wrong setup with the sending program. 

My setup from sending program is as follows: 
Midi Block Size 1024, Count 64, Delay 200

Ive set the delay to 200 as the manual states that the flash needs
100ms to write each sysex block however can someone advise the correct
block/count sizes.

Thanks
Roger