Floating Lino floor problems

Hi All,

We needed a new floor for our house and the flooring people recommended floating lino as it would be the only flooring system to put down without us having to replace all the floor underneath as our house is on steel stumps.

We have laid down some of the new Lino floating floor throughout our house, we followed all instructions given to us from the flooring people. We found as soon as the heat hit in our floorboards all buckled up and separated. We had the flooring people back who told us we had laid it wrong and that there were no gaps between floor and wall. (well that wasn't true, we followed ALL instructions, its just that the floorboards had expanded THAT MUCH!))
Anyway we ripped it up and laid it again, making a larger gap between floor and wall. Now it hasn't buckled but it is still separating. I was wondering if anyone else has encountered this problem? It is doing our head in, we aren't feeling enthusiastic about laying it again. Would gluing the joints of the floor boards together be an idea? Any suggestions would be greatly appreciated!!