IR calibration of Asus Xtion Pro

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I want to calibrate an Asus Xtion Pro with camera_calibration on Indigo in Ubuntu 14.04. However when I want to calibrate them using camera_calibration by typing:

ricardo@ricardo-desarrollo:~$ rosrun camera_calibration cameracalibrator.py image:=/camera/ir/image_raw camera:=/camera/ir --size 7x4 --square 0.0408

I get the following output:

('Waiting for service', '/camera/ir/set_camera_info', '...')
OK

At this point it stays eternally. With rgb camera works fine.

Thanks