sending problem

hi there,
i've managed to get the e-newsletter working, however, it seems to be not working properly.

when i click 'send' newsletter, it says 'The Newsletter was sent to 0 out of 3 members' (all these 3 members are my other email addresses). it says sent to 0, but i got the newsletter for 2 out of 3 emails. it also says 'sending' all the time.
i never got an email sent to my gmail account..

while creating a newsletter, when i send an email as preview to my gmail account, it gets there straight away though!

any ideas?

PS. i'm using SMTP settings with my SMTP Outgoing server being also, i'm on a virtual dedicated server if that helps..