Problem when sending SYSX to Kurzweil

Hello everybody...

I have a keyboard (Kurzweil KME61) and Cakewalk 8 installed in my PC.
I'm just tryng to backup and restore my "User Steups".
Cakewalk received and built a sysx file from my keyboard, but when i try to restore this file to my KME61, I have a "Checksum error" displaying at my kurzweil.

Can someone help me??

Thanks in advance!