how to call function in asp?

[kovan]

sorry this is vb not asp, but i get faster responses here..
and is vb related some how..

here is my mail function

Function SendEmail( sEmailServer, sFromEmail, sToEmail, sSubject, sText )
   Dim objMail
   Set objMail = CreateObject("Persits.MailSender") 
   objMail.From = sFromEmail
   objMail.Host = sEmailServer
   objMail.AddAddress sToEmail
   objMail.Subject = sSubject
   objMail.Body = sText
   On Error Resume Next 
   objMail.Send 
   If Err <> 0 Then 
       SendEmail =  "An error occurred: " & Err.Description 
   End If
   Set objMail = nothing 
End Function

i have that in a file and i include it with my asp page,s
since i dont get error including it... i assume it includes the file correctlly...

and i try to call the function from my asp pages as follow

errMsg = SendEmail("lndn1.on.wave.home.com", "[email protected]", Email, "1", "1" )

i get the following error

Error Type:
Microsoft VBScript runtime (0x800A000D)
Type mismatch: 'SendEmail'

anyone know why? thanks