ASDM Launcher Version is 1.5(50)ASDM Version is 6.3(5)ASA version 8.3(2)Windows 7 64-bitWorks fine on other Windows XP and Windows 7 - 32-bit computers I have.
Did you ever find a solution to this problem? I am experiencing the same thing and can't figure it out. ASDM starts in a tiny windows that I can only minimize or close.