When I try to send BTC on it, the summary shows me that he only send the transaction fee, nothing else! I tried several times to send to a adress of mine on the same wallet coins but every time he shows me he send 0 BTC and 0.002 (f.e.) fee. Furthermore I get only the fee booked on my wallet. Because of that I obviously get no income through the test transaction to myself. So I cant move my coins. Doesnt care which number of coins I try to send. My wallet is connected with a green lamp and I never had any problems like this.
when you send coins to your own address
(old used or new address) in the same wallet,
you will ony see the fee deducted from your total balance in the wallet
the wallet doesn't see it as an income to your wallet because there's no new coins added to your wallet
only fee amount was deducted to pay network fee to confirm your transaction
what you have done is what we called as consolidating inputs
(if they were many inputs) A transaction is being generated and broadcasted, the transaction has a fee, but since you're spending unspent outputs funding an address in same wallet , the only balance difference is the fee being payed.
Im a amateur, so if you have any ideas, please tell it to me understandable.
If someone can help me fix both of my wallets, I pay him 100€ in coins.
mocacinno has explained it pretty well, that's how it will look on your wallet
there's nothing to fix, it behaves as it supposed to