[imp] compose new message doesn't seem to recognise to:

[crane at ukonline.co.uk]

hello
I try to send an email.
I pick compose and fill in To and Subject
spend time composing message and click Send Message only to get 
message
 "you must have at least one recipient"
and all my typing is lost :(

horde-2.2.4.tar.gz  imp-3.2.2.tar.gz

regards

mick