[Typo3] mailform doesn't send mail

[Gideon So]

Hi,

I created a _VERY_ simple mailform, and it displayed in the frontend
right but doesn't send a mail. My TS as below:

lib.newsletter = FORM
lib.newsletter.data = subscriber|*input,13,40 ||
send|formtype_mail=submit|­q¾\ || |subject=hidden|This is the subject
lib.newsletter.recipient = gideonso at mcnet.com.hk
lib.newsletter.layout = ###FIELD###
lib.newsletter.locationData = 1
lib.newsletter.REQ=1

Any hints??

Gideon