6D in TV mode: what am I doing wrong?

[NB2S]

Good morning,
I ask for your help because it's the first time I use Magic Lantern on my Canon 6D.
I was trying out the new possibilities of Magic Lantern in video shooting and I noticed that in TV mode, the shutter speed remains locked at 1/33 and I can not change it.
What am I doing wrong?
Thank you so far, anyone can help me.