Accelerating Internal Dimensions and Nonzero Positive Cosmological Constant

We present a new scenario for the moduli stabilization with very small but nonzero positive cosmological constant $\lambda$. In this complex structure are still stabilized by three-form fluxes as in usual flux compactifications, K$\ddot{\rm a}$hler modulus is not fixed KKLT scenario. our case scale factor of internal dimensions basically allowed to change time. But at supergravity level it set dynamical (plus constraint) equations defined on 4D spacetime, nonperturbative corrections KKLT. Also shown that $\lambda$ fine-tuned zero, $\lambda =0$, same equations. This result changes once we admit $\alpha^{\prime}$-corrections string theory. The fine-tuning $\lambda=0$ into = \frac{2}{3} Q$, where $Q$ representing quantum 6D action and its value determined $\alpha^{\prime}$-corrections. It also must be time evolve almost rate external