My b2evolution Version: 2.x

I changed the code in the files as posted on http://forums.b2evolution.net/viewtopic.php?t=14205

Now I get the following error messages

Fatal error:
Uncaught Error of type [swift_connectionexception] with message [The SMTP connection failed to start [smtp.server.tld:25]: fsockopen returned Error Number 0 and Error String 'Success']
@0 send_mail() in /home/blogjord/public_html/blogs/htsrv/register.php on line 166
@1 swift::swift() in /home/blogjord/public_html/blogs/inc/_core/_misc.funcs.php on line 1574
@2 swift::connect() in /home/blogjord/public_html/blogs/htsrv/swift/lib/Swift.php on line 109

in /home/blogjord/public_html/blogs/htsrv/swift/lib/Swift/Errors.php on line 99