Error “”The site /ssp/admin could not be created” during SSP Creation

i am using asp.net & have a emailing module
when i use gmail host i amable 2 send the mail but when i am using yahoo host i get  error msg
the yahoo id & password are right  but still getting the below msg

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Windows Internet Explorer
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  ‘ The SMTP server requires a secure connection or the client was not authenticated. Authentication Required. ‘  
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OK  
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I have little experience with Yahoo, so I don’t know what their requirements are, but are you providing credentials when trying to send mail? http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient.aspx/

svibuk:  ‘ The SMTP server  requires a secure  connection or the client  was not authenticated. Authentication Required. ‘ Might be you gave wrong password , double check that,..have you set   SmtpClient.EnableSsl = True

Hi, use credential and Enable SSLsome similar posts are below:http://forums.asp.net/t/1557606.aspxhttp://forums.asp.net/t/1531761.aspxhttp://forums.asp.net/t/1467310.aspx