It is difficult to understand your post between the lack of detail and the broken english (I would not do good job trying to post a technical problem in another language either)
So your internet works when you have the ethernet wire and wireless connected to your router but not just one or the other.
Please answer these questions so I can attempt to pinpoint your issue?
Is the wire you are refering to the wire going from the router to the computer, or the wire going from the modem to the router?
Did this work before and stoped working, or is this a new a peice of equipment and has never worked?
Is this problem with just one computer, or multiple computers/devices?
When the wire is pluged in does it work with wifi off?