I'm flying the MiG-21Bis in DCS World (Beta Version) to Mozdok Airbase (RSBN/PRMG ch. 9). My missions have been set up during the day in very poor visibility weather. I use the radio to call the Mozdok tower (ch.13) and they respond as they should. However, they turn the airfield lights on for only a short period of time and then they turn them off well before I've gone visual and I can't ever find the airfield. I have to cancel my arrival and re-contact them when I'm close to get them to turn the lights back on. Make sure you're in landing configuration about 80km out or you'll have a very hard time...THIS is a BUG! The only Good Bug is a Dead Bug! Do you want to know more???
MiG-21bis Training.miz
BTW, real ATC is required (at least in the US) to have the lights on 30 minutes before arrival of expected IFR traffic...we only turn the lights off when we don't want them...;)...