HRA benefit

hi,

i bought a flat in the year 2007 on my name in the city X and currently living here.

last year 2010, i created a will and mentioned that the flat will be enjoying by my mother and registedred the will

my mom resides in the town A

now can i claim HRA benefit now showing my rent to my mom? can i get this benefit? the sale deed is on my name, it's only that i registered a will and gave my mom full benefit of the current home.

should my mom have to file IT returns?

pl help me.

regards,