The web services URL for XML Gateway it is returning a 404.

 
ISSUE:
the web services URL for XML Gateway it is returning a 404.  

STEP1: Set profile Applications SSO Login Types  (APPS_SSO_LOCAL_LOGIN) for ASADMIN user to 'Local'.

STEP2: Change the ASADMIN password from User Management as follows
a) Log in using sysadmin/<sysadmin_pw>
b) Choose responsibility 'User Management'
c) Find user ASADMIN
d) Reset Password (‘ASADMIN’)
e) Remove Active To date if set.
f) Apply

STEP3: Confirm the definition for ASADMIN user in $INST_TOP/ora/10.1.3/j2ee/oafm/application-deployments/oafm/data-sources.xml is defined correctly:
user="ASADMIN"
password="->ASADMIN"

STEP4: Change password for ASADMIN user in $ORA_CONFIG_HOME/10.1.3/j2ee/oafm/config/system-jazn-data.xml to be !<New ASADMIN Password> (! in front is mandatory)
Mention: ! in front of password is mandatory and this sign means that password will be encrypted
 
STEP5: Shutdown and restart the OAFM container and re-test:
sh $ADMIN_SCRIPTS_HOME/adoafmctl.sh stop
sh $ADMIN_SCRIPTS_HOME/adoafmctl.sh start

References: 
• Verify that ASADMIN EBS User for ISG and XML Gateway JDBC Connections to the Database is Correctly Implemented. (Doc ID 1089197.1)
• Cannot Start OXTA After Upgrade To R12.1.x (Doc ID 1087499.1)
• OXTA Does Not Start after upgrading database to 12.x (Doc ID 2005459.1)