New Motorola RAZR XT910 impossible activate the protection scheme

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Hello,

I have a Motorola RAZR XT910 and from the 3.10.18 version, it is impossible activate the protection scheme in the private sms messages.
When trying to activate the parameter Application crash

That thank you, hoping that this be corrected in the next version.

PS: Gallery and camera works very well for me.
Sorry for English, this is a google translation