Bowden Tube keeps being pulled out

[MinKyo 0]

Dear. All.

I've just changed the Bowden Tube because the material was melted inside the tube somehow.

Now the problem is that the tube doesn't get fixed tightly in the gear box.

It keeps being pulled out when I try to push the filament into the nozzle.

I checked the clamp is placed correctly, but somehow the clamp doesn't work either.

Please let me know if you have any idea on this.

Thank You,

Eric.