I'm not able to connect ASA thru ASDM from outside n/w the error is
"ASDM is unable to read the configuration from the ASA. please check the
configuration & your connection and then try again by clicking the refresh icon."
but able to connect from inside n/w
Two things you should try:
Try from another computer that has an older version of the Java client.
Try to uninstall the update that you just installed.
Usually if ASDM doesn't work, it's because of a java update.
*please rate if helpful*