Income Tax benefit and wealth tax liability?

Dear Friends

                     I am a salaried person from Mumbai.My annual salary is 30L.

                       I have two flats registered in my name (jointly with wife) in Mumbai purchased with loan.My company allows tax benefit for 1 flat only.I am claiming return for full interest paid on the second flat "Loss from house property"and for the self occupied flat the normal interest benefit of 1.5L interest and principal upto 1 L under 80C.

                  I have also purchased a third flat at Kolkata recently . Can I get interest  benefit under "Loss from house property" on this flat as well?

Will I have to pay Wealth Tax if I claim IT return for all three flats?                     

                 Thanks for your response in advance.

                  ame