Method: CHECK of program CX_FQDN

please help me I have all the instructions according to this file but I got the problem I could not solve it any help from you, I will be happy.
my host file
# Copyright (c) 1993-2009 Microsoft Corp.
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
# For example:
#      102.54.94.97    rhino.acme.com          # source server
#      38.25.63.10    x.acme.com              # x client host
127.0.0.1      localhost
10.0.2.15 ibo-pc.com
# localhost name resolution is handled within DNS itself.
# 127.0.0.1      localhost
# ::1            localhost
and I have used RZ10
please any suggestion, I will be happy, thank you very much ..
I have done all steps according to this file
Step_by_Step_Configuration_for_Running_Web_Dynpro_ABAP_in_SAP_NetWeaver_701_SR1_SP3_ABAP_Trial_Version
File-Upload.net - Step_by_Step_Configuration_for_Running_Web_Dynpro_ABAP_in_SAP_NetWeaver_701_SR1_SP3_ABAP_Trial_Version…

the solution is  RZ10,
I have done .
my host name + domain
hostname +  domain 
ibo-pc.com
and in windows/system32/drivers/etc/ hosts
# Copyright (c) 1993-2009 Microsoft Corp.
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
# For example:
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host
127.0.0.1       localhost
10.0.2.15       ibo-pc.com
# localhost name resolution is handled within DNS itself.
# 127.0.0.1       localhost
# ::1             localhost
thank you for all.

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    3. The tnsnames.ora file contains a parameter called DESCRIPTION. This parameter contains information about the connect descriptor for the client.
    4. The ADDRESS parameter in the tnsnames.ora file specifies the network address of the host to which the client is connected. If multiple addresses are specified, use the keyword ADDRESS_LIST before the ADDRESS parameter.
    5. Another parameter in the tnsnames.ora file is the CONNECT_DATA parameter. This parameter specifies the SID of the database to which the client is connected.
    6. The DEFAULT_DOMAIN parameter of the sqlnet.ora file specifies the domain from which the client most often requests names. When this parameter is set, the domain name is automatically appended to the service name in a connect string.
    7. The DIRECTORY_PATH parameter is another key parameter of the sqlnet.ora file. This parameter specifies the names resolution method to be used for the client-server connection.
    8. The sqlnet.ora file also contains a parameter called DEFAULT_ZONE.
    This parameter specifies the region to which the client belongs.
    [Troubleshooting the Client Side]
    These are common client-side problems and the error messages associated with
    each error code.
    ORA-12154: "TNS: could not resolve service name"
    ORA-12198: "TNS: could not find path to destination"
    ORA-12203: "TNS: unable to connect to destination"
    ORA-12533: "TNS: illegal ADDRESS parameters"
    1. The ORA-12154 error occurs when Net8 cannot locate the connect descriptor specified in the tnsnames.ora configuration file. To solve this problem, first verify that a tnsnames.ora file exists and is accessible. Next, verify that multiple copies of the tnsnames.ora file are not present. After checking the existence of the tnsnames.ora file, verify that the service name specified in the connect string is mapped to a connect descriptor in the tnsnames.ora file. Verify also that the file does not contain any syntaz errors. The ORA-12154 error also occur if there is more than one copy of the sqlnet.ora file. Verify that duplicate copies of the sqlnet.ora file are not present.
    2. The ORA-12198 and ORA-12203 errors occur when the client is unable to find the required database. To solve this problem, first verify that you have correctly entered the service name that you want to use. Next verify that the service name parameters in the ADDRESS section of the connect descriptor in the tnsnames.ora file are correctly defined. Then, verify that the tnsnames.ora file is stored in the correct directory. The ORA-12198 and ORA-12203 errors can also occur if the listener on the remote node is not running. Verify that the listener on the remote node has started and is running. If the listener is not running, start the listener by using the Listener Control(LSNRCTL) utility.
    3. The ORA-12533 error occurs if the protocol-specific parameters in the ADDRESS section of the designated connect descriptor in the tnsnames.ora file are incorrect. To solve this problem, use the correct protocol-specific parameters in the ADDRESS section of the connect descriptor.
    4. The ORA-12545 error occurs when the listener on the remote node cannot be contacted. This may happen if the values of the ADDRESS parameter in the tnsnames.ora file and the listener.ora file are incorrect. In this case replace the incorrect values with the correct values in both the files. The ORA-12545 error can also occur if the listener on the remote node is not
    started. To verify whether or not the listener is started, determine its status with the STATUS command of the LSNRCTL utility. If necessary, start the listener on the remote node with the START command.

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