Water blowing out the water inlet

Christine D

we are currently on holidays in Denmark and the water inlet (where the aqua roll attache's to the van) is actually blowing out water around the inline where it clips onto the van.  if the inline isn't clipped on it will blow it out of the inlet.  We have
a Bailey Pageant Bordeaux and we haven't had any problems with this before.  We've replaced the O rings, checked the rest of the system. Everything seems to be working normally except that half of the water is leaking outside!  The pump is working properly.
 Any clues?