If $$Cosec^{2}\theta+\cot^{2}\theta=\frac{1}{3}$$, Where $$0\leq\theta\leq\frac{\pi}{2}$$, then the value of $$cosec^{4}\theta-cot^{4}\theta$$ is:

A

$$\frac{2}{3}$$

B

$$-\frac{1}{3}$$

C

$$\frac{1}{3}$$

D

$$-\frac{2}{3}$$