Imported textures rotated by 90°?

Hey,

quick question: i created a sphere and put a textture on it (earths texture) but it is rotated on the sphere (EDIT: the poles are at equatorial level)… a rotation of the earths node by -90° fixes it but messes up the rest of the rotations prevalent in the solar system… i dont want to go over everything just because the textures messing it up -.-

any quick fixes??
[java]
public Earth(AssetManager assetManager, float radius, String location, String fileName) {
setMesh(new Sphere(30, 30, radius));
Material mat = new Material(assetManager, “Common/MatDefs/Light/Lighting.j3md”);
assetManager.registerLocator(location, FileLocator.class);
Texture earthTex = assetManager.loadTexture(fileName);
mat.setTexture(“DiffuseMap”, earthTex);
setMaterial(mat);
}
[/java]

regards
Ben