Can not run .bin – not reacting chmod properly – what is the problem?

I am trying to execute a binary and tried to open it with GUI and also with terminal but I got back this sentence. This persists for every .bin file

src@src:~/Downloads$   chmod a+x telekom.bin src@src:~/Downloads$   ./ bash: ./ No such file or directory 

As I know with chmod I highlight and then with .run I run the file but nothing happens. pic