SpamCop FAQ : SpamCop Parsing and Reporting Service : Member and account management questions :
When I try going to http://members.spamcop.net the Login window doesn't appear, or I am presented with a page, "401 Error, Click Here", which takes me to a page to reset my password.

The most likely cause is that you recently made a change in your Internet Explorer program's security settings to allow anonymous logins. This causes IE to not open the pop-up "Network Password" window.

Reset your Internet security setting to default, or add spamcop.net to your Trusted Sites list.
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