High SWR on a new dipole antenna
You don't say how much the SWR was. That could give an indication. 

Then, a folded dipole is normally 300 Ohms, unless it's fed in some special way. If both conductors (tubes) are the same diameter, and there's no transformer, and the cable is connected directly to the antenna, then there's your problem. You should have about SWR of 1:6.