XE locally works fine but I can't establish any remote connection

Question

I have installed XE on XP SP2 Pro. (Computer1)
I can connect from sqlplus in a command window with system/psw ok. and I type the command "EXEC DBMS_XDB.SETLISTENERLOCALACCESS(FALSE);" and was executed ok.
I ran "tnsping XE" and respond ok.
Thus the Listener seems to be working fine.
In other computer with W2000 Sp4 (Computer2) and oracle 8.1.7 I have created a TNS:
ToComp1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = COMPUTER1)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
I ran the command "tnsping toComp1" and send the error:
TNS-12535: TNS:operation timed out.
Somebody have an idea what's wrong?

Answer 1

On the server with XE:
goto your Database Home page. Loging using system/pwd. Once you get the next screen, goto Administration-->Manage HTTP access, enable the radio button " Available from local server and remote clients". Apply changes.
Try from the client. If no luck, then goto the firewall settings on server
Exceptions tab-->Add port-->type name and port number, in this case 1571. if needed, click on Change scope, check "subnet only" or "custom list" and give the IP address(s) of the computer you are trying to connect from.
If it still does not work, then goto the XE client and in the tnsnames.ora, change the host ="name of the computer where XE server runs,with or without domain name".
Try now from the client, it should work.
Cheers.