mask not working

Sorry...somethings off.

Are you sure theres only one mask?  Sometimes doing a complicated mask like that

you can accidentally click off and the next click will start a new mask.

Have you twirled down the layer and looked at your mask settings?

I suggest testing a very simple mask to see where the problem is.

Just drag a simple square or circle mask (not with pen tool) on a solid layer or something

and make sure everything is working correctly.  If that doesn;t work

try emptying your cache.  Sometimes a full cache can cause rendering errors.

If you can draw a simple square or circle mask (not using the pen tool) then you know you had to havemessed somewhere along the line drawing the mask.

BTW you also don't have transparency enabled so when you do get the mask to work it's gonna just be black.  Clik the little checkerboard icon below the composition window to enable it.