Hi Rocio,
Are you trying to start wsadmin client?
Please reviewe your DMGR ports and review your configuration in the properties file of your profile.
If you a launching the next comnand:
PROFILE_NAME\bin\wsadmin.sh
review the properties in file
PROFILE_NAME\properties\wsadmin.properties
com.ibm.ws.scripting.connectionType=SOAP -> Check in DMGR ports SOAP port or if you have RMI check RMI port
com.ibm.ws.scripting.port=DMGR_SOAP/RMI_PORT
com.ibm.ws.scripting.host=DMGR_HOSTNAME/IP
after you have the correct protocol, port and host check that you have connection with DMGR ports (f.e doing a telnet telnet DMGR_HOSTNAME DMGR_SOAP/RMI_PORT)
launch the command again.
Hope this helps. Tell us if you need more support
Regards