Pressure of 2 immiscible liquids of diffrent density in a u tube

so they are not same but they must be.where am I getting wrong?

Why 'must they be the same'?

We can ignore the part below $A$ and $B$ in the semi-circular part of the tube.

Now, to have equilibrium (no movement) we must have the following balance of forces:

$$|CB|Arho_R g=(|AC|+|CD|)Arho_L g$$

Or:

$$|CB|rho_R=(|AC|+|CD|)rho_L$$

The pressure at the left hand point $C$ is given by Pascal's Law:

$$p_C=p_0+rho_L g |CD|$$

So these pressures don't have to be same and they aren't.