Hey thanks for your replies.
At first i have to say that o had reset the remote control.
Now i have tried the Toshiba and Apex codes.
Some of the Thoshoba code did work, but not all buttons (just like before).
I can turn the tv on and of. But the problem is, that he thinks that the left arrow button is for volume down.
If i press the real volume down button, nothing happens.
Please i need the button codes :(