This is normal, because many 6.20 systems don't support dragon and tiger, and so does my brother's Go, which is garbled. Later, he patched it, this gba.com/viewthread.php?. . Tid = 1868 1060 Try it. If not, you can try to upgrade 6.20PRO-B4. It is possible to solve it. It is recommended to upgrade in a professional place!
Satisfied, please adopt.