Brand new ASA 5510 with ASA 7.x and ASDM 5.x was able to run the Java ASDM and do initial config. When I found out I had to upgrade both ASA and ASDM to run the launcher on windows 7 I upgraded ASA incrementally from 7.x to 8.3 and asdm straight 5 to 6.3. Now I can't launch either the Java asdm or the downloaded and installed asdm. I see others have had this problem but haven't found a solution.
I have this problem too.