I installed the V10 upgrade for alabamatoy.
I found the problem... It was missing the table ThreadThanks
It was never created during the V9 --> V10 upgrade.
I inject the code into the ajax_post_thanks.asp file and ran it once and it created the table.
'Create the ThreadThanks Table
strSQL = "CREATE TABLE [" & strDBO & "].[" & strDbTable & "ThreadThanks] ("
strSQL = strSQL & "[Thread_ID] [int] NOT NULL DEFAULT (0),"
strSQL = strSQL & "[Author_ID] [int] NOT NULL DEFAULT (0) "
strSQL = strSQL & ")"
'Write to the database
adoCon.Execute(strSQL)
The thanks functionality appears to be working now.