iPhone 4S won't exit recover mode after restore

Yesterday my sister told me she had a problem with her iPhone.

She was on 5.1.0 and updated OTA to 5.1.1. When the update was done, her iPhone rebooted and displayed the 'connect to iTunes' screen. She gives it to me, I do what I can and after several restores the only thing that shows up after a restore is the 'connect to iTunes' screen. In iTunes, it says it's in recovery mode and needs restoring.

iPhone 4s white

any solutions?

So i switched data cables to see if that was the problem. I used a brand new one. Now half way through "extracting software" is gives me this message:

"The iPhone 'iPhone' could not be restored. This device is not eligible for the requested build."

Ok, so i fixed the previous message. But I am still not able to get out of recovery mode after restores.

i tried Tinyumbrella's 'exit recovery' but no help.

OK i fixed it.

I had to restore back to 5.1 and not 5.1.1. Apparently 5.1.1 is not working with this iphone for some reason. Thank God apple was still signing 5.1 restores