Ok, this has been solved:
By changing at Broadcast: Broadcast to chain.so

Man the solution was so easy lol.

I had a double spend error with Monero.
I still have the seed, which I can import. But after doing so, I get a new wallet for some reason.

I also have the private keys, but when I try opening my wallet through that way it can not continue opening it.
Anybody knows where I can get good help for that? Because this is not the place of course. Maybe there is a monerotalk.org?
I'll look it up.

Thanks for trying to help guys.