AspSmartMail.SendMail : Error 28 Error '8004001a', 504 Invalid Username Or Password

Let me start by saying I'm fairly new to Asp coding. That said...

My ISP only uses AspSmartMail. I've created an online form that uses fill out, which is then e-mailed to the collector of the information and CC-ed to the person who submitted the information.

The error I'm receiving is this:
aspSmartMail.SendMail : Error 28 error '8004001a'
504 Invalid Username or Password

In my script, I've Dimensioned several items, as you'll see below, passing the authenticating username/password to the smtp server, but it's not working. I tried not passing the information by entering in the actual info without it being passed by the diminsioned items. This didn't work either. I of course verified that the username/password I'm usine is correct.

Can someone plase tell me why I can't authenicate? I would really appreciate any help that might be out there.

Relavant Asp code below:
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Dim smtpserver,youremail,yourpassword,yourusername,rem oteemail

'Edit these 3 values accordingly
smtpserver = "mail.smtp_server.org"
youremail = "yourname@smtp_server.org"
yourpassword = "password"
yourusername = "yourusername"
remoteemail = "email_address_to_send_to"


Dim ObjSendMail
Set ObjSendMail = Server.CreateObject("AspSmartMail.SmartMail")

'Config remote SMTP server info.

ObjSendMail.Server = smtpserver
ObjSendMail.ServerTimeOut = 35
ObjSendMail.SenderAddress = youremail
ObjSendMail.Password = yourpassword
ObjSendMail.Username = yourusername

'End remote SMTP server config.

'Config E-mail.
ObjSendMail.Recipients.Add remoteemail
ObjSendMail.CCs.Add Request.Form("Confirm_Email")
ObjSendMail.Subject = "Email Subject"
ObjSendMail.SenderAddress = "Confirmation-NoReply@smtp_server.org"
ObjSendMail.SenderName = "SenderName"

ObjSendMail.ContentType = "text/html"
ObjSendMail.Body = strBody
'Note - strBody is Dimensioned elsewhere in my script to build the HTML message body.

'End Config E-mail.

'ObjSendMail.Send
ObjSendMail.SendMail

if err.number <> 0 then

response.write("Error n° " & err.number - vbobjecterror & " = " & err.description & "<br>")

else

Response.Write "aspSmartMail has sent your message with this file as attachment : <br>"
'Response.Write ObjSendMail.Attachments.Item(1).FilePathName

end if

Set ObjSendMail = Nothing

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End code