error with webform smtp? in drupal 6.3

Hello!

I'm having an issue. The form does not send email or do anything, but stores entries into database where you can view while in interface. It does not send an email.

here is the error I am getting:

warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_date' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_date' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_select' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_select' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_textfield' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'theme_webform_mail_pagebreak' was given in C:\Apache22\htdocs\ucsf\includes\theme.inc on line 597.
warning: mail() [function.mail]: SMTP server response: 501 5.5.4 Invalid Address in C:\Apache22\htdocs\ucsf\includes\mail.inc on line 193.
Unable to send e-mail. Please contact the site admin, if the problem persists.

thanks for your help!