The first address Carter "dials" doesn't work, so what does Carter do? Try the same address repeatedly. Then assume that when it doesn't work, there is something wrong with the dialing device or the Stargate. For some reason, it never occurs to Carter to try to "dial" ANY OTHER ADDRESS into the Stargate to go to any other world. The story line does not allow this, because the writers didn't know how to get from that logical point, to the end point of the story they are writing. I think that they could have if they really tried, but perhaps were under time constraints. I really hope that they were not just stupid or lazy.