Spot the Difference

[fizzwizz]

Both of these sites are running identical pages.
www.fizzwizz.net
www.fizzwizz.com
yet the .com has errors.
They are hosted on different servers with different versions of php
4.0.3pl1 for .net
4.0.6 for .com

however I can find no significant differences in versions.

I am unfamiliar with the errors generated

Warning: Cannot send session cookie - headers already sent by (output started at /home/virtual/site1/fst/var/www/html/index.php:2) in /home/virtual/site1/fst/var/www/html/index.php on line 4

Warning: Cannot send session cache limiter - headers already sent (output started at /home/virtual/site1/fst/var/www/html/index.php:2) in /home/virtual/site1/fst/var/www/html/index.php on line 4
845
Warning: Cannot add header information - headers already sent by (output started at /home/virtual/site1/fst/var/www/html/index.php:2) in /home/virtual/site1/fst/var/www/html/index.php on line 113

Does anyone have any ideas

[Anon]

The headers already sent error means that your webserver has already sent something to the browser and you are trying to send headers again. This usually occours when you have a space outside of your <?php ?> tags. Check all of your code and make sure everything is inside of <?php ?> and then check to see if you are echoing or printing anything before you open your session.

[fizzwizz]

Thanks Rob
What you wrote here helped enourmously.
It seems that when I duplicated the fizzwizz.net page I copied and pasted it and left a blank line at the beggining. Removing this cleared two of the three errors.
The third error was more tricky. From what I can tell the script engine doesn't seem to be able to setcookies from within the body tags on the .com server. (wont add details to the header) but it will with the .net version. I had to alter the code here, but I'm sure you should be able to set cookies from the body!?!

Thanks again