i murthy i recently add one more related site into local business center listings, first my listing is very good for some specific keywords, after i add one more site to same account it will suddenly disappeared www.freelancehyderabad.com/
maybe was reported as abusive or you just broke some kind of rule... always can contact them and ask.
I have noticed that sometimes things will disappear from google temporarily but will show back up for whatever reason. give it a few days and if you still have a problem, you might want to try to contact google (although you never know about a response from them, especially regarding maps)