Hi Fink,
I am adding a user by executing add-user.bat file present in jboss_home/bin/ directory which adds the user entry in mgmt-user.properties file( located in C:\Temp\jboss-as-7.1.1.Final\standalone\configuration).The content of mgmt-user.properties file is as below:
#
# Properties declaration of users for the realm 'ManagementRealm' which is the default realm
# for new AS 7.1 installations. Further authentication mechanism can be configured
# as part of the <management /> in standalone.xml.
#
# Users can be added to this properties file at any time, updates after the server has started
# will be automatically detected.
#
# By default the properties realm expects the entries to be in the format: -
# username=HEX( MD5( username ':' realm ':' password))
#
# A utility script is provided which can be executed from the bin folder to add the users: -
# - Linux
# bin/add-user.sh
#
# - Windows
# bin\add-user.bat
# The following illustrates how an admin user could be defined, this
# is for illustration only and does not correspond to a usable password.
#
#admin=2a0923285184943425d1f53ddd58ec7a
testuser=f46819a17821f3fcd5b8fb1fa77d02e5
Also, regarding webconsole output, i get only this error message " The webconsole page could not be loaded. Please refresh to start this page.