QUOTE(btech @ Oct 5 2008, 10:32 PM)

I reset my password on SCMail,
OK, that's on the e-mail systems/server in Georgia .. east coast U.S., JT's machines.
QUOTE
but when I try to log into the reporting system ('Report spam'), neither my new or old password will allow me to log in. I cleared my cookies and the issue remains.
That would be the www.spamcop.net dydtem/servers out in California, U.S. west coast, Cisco/IronPort/SpamCop machines.
The pont being that the account data/passwords are held on different machines, there is no co-linking involved. (yeah, yeah, but the HeldMail link is a contrived bit of backdoor handshaking that allegedly had development halted a number of years back.)
Go to www.spamcop.net and log into that web-page. This should generate the required cookie for that system (if you allow cookie-based login/storage)
You don't mention the browser, OS, etc. so it's hard to guess at just how your cookie management might come into play at your system level .... you might have one cookie based on the spamcop sub-domain, you might have three (or more) cookies, one for spamcop. one for mail.spamcop, one for forum.spamcop ..... (possibly one for mailsc.spamcop)