Gmail as smtp server and problems

hi, I do not have an smtp server installed in our company, how sad.
however i tried to use the gmail
using
smtp.gmail.com (as required by gmail)

myusername@gmail.com and password

and port 25
however when i tried to process the registration:
i got this : include/commonfunctions line 2434...
weh i opened the file to check:
myMail.Send
and nothing more.
can you guys help?