I'm sorry, but I'm away from office until August 19th, so I cannot check it but, I assure you the SODE jetways are working at KIAH.
Your explanation of the problem is not very clear: you say "nothing happens", but that's not what is supposed to happen, even if there's a problem with calculating the jetway animation, for example if you parked the plane too far or too close. You should at least see a message from GSX saying the jetway cannot operate, not just "nothing". Are you seeing such message ?