Hello all, Im new at this so any help would be appreciated.

I have a 2005 neon, I have had it for 3 yrs and only had to put it in the shop this yr. I have noticed that every time it rains my back passenger floorboard gets soaked. The window is not down and the door is shut good. The seat isnt wet and the door panel isnt wet just the floor board, and I dont just mean wet, I mean water standing. Its like someone poured a jug of water in the floor. I was wondering if anyone else has had this issue and if so what you did to fix it. I did have a simalr problem in the front passenger floor board at one time but took it to the shop and they said that the antenna was loose and they tightened it and I havent had that problem again.