Ok i really need help. I have a dunlop bike. The tyre is flat and I really want to pump it. i use a single hand pumper. My dad attached it to the tyre and he did it and he said that nothing was getting air. He checked and he said he can't do anything about it. How can I make it pump? would it be the tube? I don't know if it is i haven't done it in ages. PLEASE HELP ME!