Analogue-sequencer

Hi,

My P3 works just fine, but I wanted to update from 3.001 to 3.006.
Since I have a #2004 CPU, I thought I had to update the bootloader as
well ? 
Everything I do, I get the same message BAD DATA. 
When I start it up holding Func+Page, I get Checksum = B19A.
I play the midi file in cubase, even nudged it a bar. I use a MOTM
micro lite midi interface and send over channel one. I've tried with
and without an extra midi cable from the P3 back to the Micro lite.
I've tried also with P3tools, but that doesn't work either. That can't
receive any data from the P3, nothing happens...

Can someone please help ?
thanks

Niels