I'm trying to get Apex up and running and I'm not having much success. I'm a complete newbie when it comes to Apex and I've never used it in any way before, so it may well be that I'm doing something stupid. My Oracle version is 11GR2 and the platform is Windows 8.1 Pro 64 bit.
I've been going through the Apex installation guide (http://docs.oracle.com/cd/E37099_01/doc.20/e25066/install.htm#AELIG7015) and the REST config guide (http://docs.oracle.com/cd/E37099_01/doc.20/e25066/install.htm#AELIG7182) and I've done each of the steps without anything failing (as far as I'm aware). I've checked that the install is valid by running:
SELECT STATUS FROM DBA_REGISTRY
WHERE COMP_ID = 'APEX';
...and it comes back with "VALID".
I'm running the server in standalone mode, i.e.:
java –jar ords.war
...which comes up with:

However, I don't seem to be able to connect. When I try and access http://localhost:8080/apex, it doesn't give any errors, but it just shows a blank window:

If I try and access http://localhost:8080/apex/admin then I get:

Is there anything else I can check to see if (or rather, what!) I've done wrong or missed out...?
Thanks