to allow access please respond on your ipad

Hi,

After many problems witj my iPad, here is another one

When I connect my iPad 2 wifi 16GB to PC, I got response from itunes "to allow access please respond on your ipad"

So I go to ipad, I slide it to unlock, and white line appears so I cant click on anything, until I disconnect the cable.

So the point is that I cannot allow access.

I tried full reset (I leave it few hours more times, and it cannot reset)

I tried restore in DFU mode. It completes, and after is the same. Only white bar appears, and nothing happens.

I tried click on every point on my screen, but without success.

And sorry but I must to say that Apple have worst software protecting solutions, they try to protect everything, and at finish they they protect own software from work.

I always have this kind of problems with it, and I always have to spend weeks on forums to solve a problem.

Here is picture that I taken with my phone (bc I cant save screenshot from phone, bc of this problem)