Help Screen not working after flash - Samsung Captivate

[djeepih]

Hi everyone,

I tried to upgrade my Samsung Captivate from 2.2 to 2.3, but after I flashed it via Odin, I reach the "insert your sim card" screen but my touchscreen isn't working, so I can't select anything and I'm stuck on that screen.

I can't even select mass storage mode to upload update.zip...
Besides, from the recovery mode, I have a signature verification problem, which prevents me from updating my phone with the update.zip I uploaded before flashing.

Does anyone know how to get this screen back to work?
Is it a ROM related issue (I tried KF1 and KE3... same outcome)?
If I can flash it with Ice Cream Sandwich, that would be even better...

Thanks in advance!