god and dilema of philosophy of critiquing

in his critique of purge reason, kant insists that the human understanding is only able to know phenomena. however, in critique of practical reason, he proves the objective reality of god, freedom and immortality of soul. at first, the result of the two critiques seems to be at odds with each other, with kant himself calling the problem, the dilemma of philosophy of critiquing. by putting forward and solving the problem, he asserts that the transcendental idealism of phenomena and the supposition of the intelligible world constitute two fundamental pillars of a single philosophy. based on that, having proved god as a requirement of practical reason in the second critique, he goes on to assign understanding, will and creativity to god as three fundamental determinations. later, he connects the three fundamental determinations with another determination, which is spontaneity. kant is on the belief that assigning the determinations to god and proving its existence do not contradict the results of the first critique, resorting occasionally to analogy and to the different applications of categories in the first and second critiques in order to remove the contradiction. yet, kant seems unable to remove the contradiction between the two critiques in this way.