That's not for sure. Try it with wotan:
1. Delete login information
2. Take out your battery
3. Press start button
4. Press 2+5 on your phone
5. connect to DCU-60
6. insert battery (while still holding down 2+5)

I had two K610i with blinking red led. One could be repaired with an EROM repair. The other one couldn't even get connected to the PC, just like in your case. Data cable didn't help either. I always got that annoying red light when I tried to connect it. No matter what cable I used.

Good luck!