created a new standard electrum wallet with seed
after that i clicked "wallet" -> "sweep" -> pasted private-key
funds are now in tx from paper wallet to standard electrum wallet.
So the funds were still on the original paper wallet? Earlier you said the transaction was confirmed. None of this makes much sense, but at least the end result works. Don't lose your coins again
If your coins on your paper wallet were old enough, you may also own some Forkcoins.