I have an annoying issue with the pushback function. The truck shows up, connects and then immediately disconnects without initiating the pushback. It has always been like that except for those odd occasions when it suddenly works! There doesn't seem to be any connection to any scenery installation, it just happens on both default and add on airports. Lately I've found the same issue happening when using the built in pushback features in Airbus X Extended and PMDG 737, they both worked fine until a couple of days ago when they suddenly went all "FSX" on me and went into that very same touch'n go mode. Again, no apparent connection to any add ons but I did reset my FSX.cfg recently and was thinking that may be a possible cause? I'm not using any ground service add ons. Any ideas on where to start looking for errors?