does dichloromethane dissolves an organic solute basis on the polarity of that solute or on the basis of another properties ? sometimes particular solute dissolves only in dichloromethane, but not in a solvent even more polar than dichloromethane. why ?

The basis for a solute to dissolve in a solvent is the similar force of attraction.
Let we have solue A and solvent B and F_A-A,F_B-B and F_A-Bare force of attractions between A only between B only and between A & B respectively.
So only one condition is sufficient to say whether the solute is soluble or not is:
F_A-A ~F_B-B ~FA-B
Generally polar substance dissolve in polar solvent and Non-polar substance in non-polar because because there force of attraction are comarable and satisfies above condition whereas non-polar substance(having weak force of attraction) in polar solvent(strong force of attraction) is notsoluble as there interaction forces are not comparable...........