AppleScript SL to ML Issue (compatibility error?)
this might fix it, failing that can you post the contents of the plist files from ~/Library/LaunchAgents

on adding folder items to this_folder after receiving the_files

--set login vars
set fileExt to "zip"
set scpIP to "blah"
set scpUser to "blah"
set scpDest to "/home/blah"
set scpPort to "1234"

--repeat on each file that is added to the folder
repeat with each_file in the_files
    set filename to name of (info for each_file)
    --check extension, if match, scp. else, error.
    if name extension of each_file is fileExt then
        try
            do shell script "scp -p" &amp; scpPort &amp; " " &amp; scpUser &amp; "@" &amp; scpIP &amp; ":" &amp; scpDes
            tell application "System Events" to move each_file to trash
        end try
    end if
end repeat
end adding folder items to