Pokemon DIAMOND GLITCH (?)

[juanpironi]

Hello my friends, please, I need help!!!
I was playing Pokemon Diamond and I closed the Poketch function as you see in the image below.
I Touch All the keys on my keyboard to see if it was activated and I do not succeed...
I Use the DeSmuME EMULATOR HELP!!!!! 

[theSLAYER]

Have you progressed to the stage where you can use Poketch.

use PKHeX to re-enable Poketch..

[juanpironi]

9 minutes ago, theSLAYER said:

Have you progressed to the stage where you can use Poketch.

use PKHeX to re-enable Poketch..

Yes, I'm in the stage where I can use it, I'm in Veilstone City, I'm in the casino and when I left I did not have the activated Poketch anymore.
When you say activate the Poketch with PKHEX you mean as in the image below?
If I select another function of the Poketch of which I have ACTIVATED and I save the save, at the beginning of the game, a message tells me: SAVE DAMAGED will be started from the last saved game.
And I still do not have the Poketch function

[juanpironi]

19 minutes ago, theSLAYER said:

Have you progressed to the stage where you can use Poketch.

use PKHeX to re-enable Poketch..

If I choose any of the options marked in the image and save it the save.
When I continue my game, it says this:

Damaged game The previously saved game will be loaded.

[theSLAYER]

Load the previous save, save in-game twice, then back up that save, and send it to me here.

[juanpironi]

31 minutes ago, theSLAYER said:

Load the previous save, save in-game twice, then back up that save, and send it to me here.

Thanks for trying to help me.
I already solved it using the POKE SAVE (re-activating Poketch)