Cannot send email from admin

[Guest]

I am running osCommerce 2.2, my customers are receiving an email when they create a new account, and when they buy something, but if I try to send them an email from within admin I get the following error:

 

Fatal error: Call to undefined function: tep_convert_linefeeds() in D:hshomesonicstasonicstars.comadminincludesclassesemail.php on line 150

 

Anyone have any ideas?

 

thanks