Geraiax

Hi, I recently started creating fashion for second life. So far it works OK with Avatar. Like many other I create clothes with Marvelous Designer, export them to blender and use Avatar for rigging and then do some additional weight painting for the details. Now I wanted to create jeans for a Maitreia Avatar and as soon as I export it to blender the mesh between the legs stucks together as one mesh. Also I tried to change to a-pose of the maitreya avatar but then I run into problems with rigging with avatar. Does any body has some ideas, how I can create trousers properly for second life without baking together?