Problem reporting spam

I forwarded a bunch of spam to Spamcop this morning, and I was able to 
report a bunch of it just fine.  However, one piece of spam keeps giving me 
"gateway timeout" errors whenever I click on the "unreported spam saved" 
link.  If I use a direct link found in the Spamcop emails I get, then I can 
report any of the other spam that's saved.  But it keeps hanging on this one 
spam and I don't know which one it is, nor how to get rid of it without 
getting rid of all the spam I've sent in so far.