Are you trying to download the trial version from the Oracle downloads site? Or a licensed version from the CSO site?
If the former, the 126.96.36.199 link worked fine for me. The login page doesn't really make it clear that anything was happening, but my status bar showed the download in progress. I didn't see a link for 188.8.131.52, what URL were you using?
If the latter, you'll probably have to contact your Oracle rep.