AppleScript email?

I have an created an AppleScript email that is run through Perform AppleScript and in Perform AppleScript Options, Native AppleScript is selected. It runs fine on one mac, but does not create an email in another mac. Both Macs are using the same database hosted on a third mac that is running Server 7. Anyone have any thoughts on this. Script is below.

Thanks in advance - Sam

set theSubject to cell "emailSubject" of current record

set theMessage to cell "invoice_email" of current record

set theRecipient to cell "dentist_info::emailandcc" of current record

set theSender to cell "emailSender" of current record

tell application "Mail"

set newMessage to make new outgoing message with properties {subject:theSubject, content:theMessage}

tell newMessage

set sender to theSender

make new to recipient at end of to recipients with properties {address:theRecipient}

tell content

end tell

save newMessage

end tell

end tell