who knows this sci fi film

a sci fi film from a few years back when a man and wife couple were trying to make contact with outer space and the towards the end i remember them blowing the place up by releasing flammable gas ? would like to see it again but cannot remember the title. i have just watched the film (contact) from start to finish and although it was obvious from the beginning that this was not the film i was looking for i decided to carry on watching. i remember seeing this film shortly after it was made in 97 quite enjoyed it....