Is your GPS working ? Check in location services and switch it on.
Then have you selected offline as map renderer in MapTool
After switching on your data see if google maps works (it takes a few tries before it'll work due to slow data speeds etc) If google maps is showing location that means gps is working so we can then troubleshoot the maptool thing.
Also ensure that you have hyderabad maps downloaded since maptool will locate you there and if hyderabad maps are not present in the required folder (as per instructions) then it'll show white screen.
Thanks a lot Amitabh....I had to enable Google Services on GPS option and now its working perfectly.... one more question...am unable to navigate on MapTool (offline) like i can do on Google Maps. That is i cant navigate away from my current position in Map Tool. I am a novice, but is it that in offline MapTool only one tile is loaded when you are stationary thus cant navigate to other tiles.....