Looks wrong to me, but I am not even sure what you are trying to draw as your product. Are you trying to say K+(CH3Cl2)-? If you are saying that then I know you are on the wrong path.
I think the chloromethane would just dissolve the KCl salt, but not even sure about that since chloromethane has such a low boiling point (-24.2 deg C). Water has a dipole moment of 1.85 D and chloromethane has a dipole moment of 1.9 D so it is polar enough to dissolve the KCl, but like I said chloromethane has such a low boiling point not sure if the KCl would be very soluble at those temps.
How in the world would one try to carry out this reaction? By blowing some CH3Cl gas over some KCl or what? I mainly ask that for my own benefit.