Module development and code questions

I'm working with the best way to place adsense advertising.

I've written a module to do it the way I want, and now I'm getting this error.

Cannot modify header information - headers already sent by (output started at /usr/www/users/davidh/modules/adsense_inline/adsense_inline.module:52) in /usr/www/users/davidh/includes/common.inc on line 224.

Another line reported is at common.inc line 192. I am using drupal 4.6.2 (so that you know where the line#'s point).

In both cases the header() function is being called.

Can someone help me understand how to avoid this error? The code for my module and some discussion follows.

Yeah i have bidvertiser ads, now how would i add them.. they are in javascript

Hi,

I'm looking for an experienced module developer to write something for www.threadwatch.org

Rough Spec:

For a custom module I am developing, I am trying to find a way to capture the time a user spends viewing a node/page in real time. In this quest, I have been tinkering with the _init and _exit hooks - but that does not seem to be accomplishing the goal. Any ideas on how to accomplish this are greatly appreciated!

Regards,

Radi Shourbaji
http://www.profconnect.org/radi-shourbaji

Whether I use the menu link or go to the direct url /admin/modules doesn't show up. When I could get the page I have a new module that won't show up on the list so that I can enable it. It's _node_name, all function names begin with, and the name of the file is insurance. I'm stumped. Thoughts? Suggestions?

Even though the URL param reads "?q=cases/details/26", arg(0) equals "cases" but arg(1) and arg(2) are empty.

What could be the problem?

Thanks.