GATT Client

Hi all,
I am trying to run the btgatt-client.c example in the source
code(http://git.kernel.org/cgit/bluetooth/bluez.git/tree/tools/btgatt-client.c)
to connect to the TI sensor tag. But I am getting 'GATT Client not
initialized'. Please let me know how can i initialize the GATT
Client?.

Thank you,
NagaChaitanya Vellanki