Elektron Musical Instruments

Hi gang,
little help needed here : I can't send patterns back to my MD. The 
doll keeps screening the message :"sysex error type 2". 
Do you know what it means, or what I do wrong ? Dumping back kits 
works fine, but patterns seems to give problems. 
Anyone knows the same ? Has known the same ? Has fixed that ?
Thanks in advance---
Wayne-