EF 17-40mmL focus distance, anyone?

[eos600]

Hi, I have bought a second-hand EF17-40 f4 L lens and was hoping to do a bit of focus stacking, however ML says " Your Lens did not report focus distance"   
The ML wiki suggests that this lens should report the focus distance.
Does anyone have any experience with this lens?
Any pointers would be really appreciated!
Many thanks.

-The issue could be down to my inexperience with M.L rather than the (my?) lens having a problem.
I have looked at the exif data from a few pics and, for example, from a close focussed shot it says :
Focus range- Not known
Fous distance upper- 0.28m
Fous distance lower -0.28m
Hyperfocal distance- 20.94m

The camera body is an EOS Kiss X5 (the same as a 600d?)

[budafilms]

Have you update the lens info in your canon software? You should have the cromatic and color aberration working in you camera. i hope this help you.  Have te same lense and no problem.

[Francis]

There is no guarantee that a lens' firmware is the same between production runs. Someone's previous experience might not be the same as your own.

[eos600]

Thanks everyone - I had best go and try out a new lens in a shop!
-Very annoyingly (and as far as I can see) my exif data contains more range information than the other 17-40 photos that I have found on the web, but maybe that is just a reflection of the body.

[eos600]

Oh dear - I should have mentioned that I was new to ML:
The lens is absolutely OK; I simply hadn't switched into LiveView mode!