Problem creating WebDav connection to review XML schema in JDeveloper 10g

Question

I am trying to review some XML schema and cannot seem to create a WebDav connection. I entered all the relevant info and keep getting the following error :Testing connection...
Connection test failed: unable to connect
Unable to connect to WebDav Connection1 (http://localhost:8080/)
May require proxy to connect to the location,
when I tried to test the connection. The tips given in the help section didn't work either. Could someone please help me?

Answer 1

Thanks for your prompt response.
I had done that before yet, it still doesn't work.
Please, bear with this newbie, for a second.
I think it may be relevant to mention that I am trying to create a connection on my local network.
Had no problems when I try to connect to enterprise manager,or iSQL*plus console, or creating a database connection through Jdeveloper, or even to the HTTP server through the browser. I am using windowsXP platform BTW, if it makes a difference, and Jdeveloper 10g. When I try to create the webDav Connection it still gives me the connection failed error, .....
Testing connection...
Connection test failed: unable to connect
May require proxy to connect to the location
Additionally ran this script ....
DECLARE
HTTP_PORT pls_integer := 8080;
FTP_PORT pls_integer := 2100;
config xmltype;
BEGIN
SELECT updateXML(dbms_xdb.cfg_get(),
'/xdbconfig/sysconfig/protocolconfig/httpconfig/http-port/text()',
HTTP_PORT) INTO config
FROM DUAL;
DBMS_XDB.CFG_UPDATE(config);
SELECT updateXML(dbms_xdb.cfg_get(),
'/xdbconfig/sysconfig/protocolconfig/ftpconfig/ftp-port/text()',
FTP_PORT) INTO config
FROM DUAL;
DBMS_XDB.CFG_UPDATE(config);
END;
COMMIT;
-- Updates configuration
BEGIN
DBMS_XDB.CFG_REFRESH;
COMMIT;
END;
-- Creates /home Directory
DECLARE
result boolean;
BEGIN
result := dbms_xdb.createFolder('/home');
dbms_xdb.setAcl('/home','/sys/acls/all_all_acl.xml');
commit;
END;
list
OUTPUT from script....
PL/SQL procedure successfully completed.
Commit complete.
PL/SQL procedure successfully completed.
DECLARE
ERROR at line 1:
ORA-31003: Parent / already contains child entry home
ORA-06512: at "XDB.DBMS_XDB", line 195
ORA-06512: at line 4
Still no luck! What I am i doing wrong?
Any pointers will be appreciated.