2
hi tayling
add redirect_header for external links like this:
redirect_header("http://www.google.com", 3, "Your are going to google.com" , true, true);
Also if you want to upgrade to 2.5.5 i recommend you to use the full package 2.5.5
Edit:
I test the above and found you should write the full URL of the external link (http://www.google.com instead of www.google.com)