problem with animation

Hi All, i read ADVANCE Animation book, it is introduce about animation, and code implement animation. i have implemented it, but it is not best work. it is correct with animation is matrix. in x file have 4 type for animation: 0 : rotation 1: scaling 2: translation 4: matrix when load animation from x file that only have matrix animation then it is OK but if load animation from x file that have (0, 1, 2 type), it is not best work. can you help me?