need help adding banner code

I need help entering a banner code on my poker site i dont know much about php i put the code where i though it would go and the banner showed up but messed up the rest of the site with database errors.
this is the code <center><?php

$script_path = "advertising/";

include_once ($script_path."placebanner.php");

placeBanner(1);

?>

i added the same one at the bottom of the page no problem i was told because it was after all the codes.I will send you the page i want to add to please help thanks

 

Does the banner script use a database?

 

yes it does

 

So, when you include that php file, it probably throws the db connection to another database? If you want to send me some links, I can take a look.

 

No one here can help i can pay you.thanks

 

New error but getting close
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/lee12345/public_html/prizepkr.com/poker.php:1) in /home/lee12345/public_html

 

in the banner code, remove session_start()