1. Start Wotan client and remove the user data.
2. Remove the accu from your phone.
3. Press "Start".
5. Hold down 2+5 on your phone, connect it to the cable (DCU-60) and
6. insert the accu again.

That's it. Now wotan should fix your EROM. Helped many people with the old, buggy EROM of K610i and K800i.

Another way to rewrite the EROM is using SE-Tool 2 lite (for free).