Cannot BLF call forward

Hello, Igaetz, the problem for me is exactly here. I managed previously an Elastix 2.5 installation, and I can still access it. In this installation, “core show hints” shows four hints for each phone :
41@ext-local
*2141@ext-cf-hints
*7241@ext-findmefollow
*7641@ext-dnd-hints

I am preparing an Elastix 4.0 installation. In this version, core show hints shows only one hint for each phone, there is only one hint beginning by * in the full listing, *85@park-hints, which does not correspond to an extension. In this version (Asterisk 11.20.0) is there something to activate somewhere to have the hints generated ?

After that, things are easy : In Elastix 2.5, I had just set a programmable key :
BLF → *2141
And this switches the call forward, and switches the lamp as well (on an Aastra 6755)
And I had several keys for different forward :
BLF → *2133
BLF → *2155
etc.

I think it should work as well with :
BLF → *210689123456

Note that on this system *21 is the code defined for Call Forward Toggle

UPDATED : I found the ansver here :

http://community.freepbx.org/t/solved-blf-hints-not-working/13491