Hi - i have one of these strange 'Sherlock Holmes' mystery problemes... Knowledge:I'm running FS9, have installed FStraffic 2002 + upgrade patch too 2004 + Cap. Sims 727 package incl. 2004-patch.PROBLEM:My radiocommunication with atc dissapears - I can open and close the atc-window but there are mostly no options to choose. Sometimes I can hold at rwy and wait for TO-clr from tower but it liked they have gone home?? Then if I take off and all the FS9 options withe diff. altitude-req, change of destination-req etc. - they are not there? And ATC don't even ask me for anything - no clr thru airspace, hand-over or anything... as I said it is like they have closed down for the weekend and gone to the pub...ONE EXAMPLE:Most strangely are that I can start with the atc working - from startup to req clearance, getting taxi-approval, taxing to rwy, being told to hold for landing ac.... and then boom!... totally silence and my holding there for 30 minuttes with a que behind me linening up like rushhour traffic in LA??? QUESTION:Does it have something to do with FS2002 Traffics voicepacks? I run the default FS9 voicepack and the FS Trafficks traffic-pack (not the FS9). Or is it something elseAny help?cheers, walle

Are making sure that the radio changes frequencies automatically? Observe the radio stack to be sure it does it...thats a place to start.

Walle,This happens with a loss of elecrical power. Make sure you are running either APU or engine generator power for the avionics within a few minutes of turning the battery on, otherwise the battery goes flat and ATC goes silent!Gary

Yep, sounds like a battery/electrical issue. Dont forget, you can also use FSUIPC to extend battery life indefinately.Brew

Thanks too all of you.I will try it in a few hours but it sounds just right. But damm - why didn't I think about the battery myself. I was way off in another direction thinking software problems and so on... somestimes you just can's see the forrest in front of you because of all the trees:-) I forgot that we are flying in an as-realistic-as-possible simulator... :-)cheers, walle