redirection failure

[eluser]allibubba[/eluser]
after moving my local CI app up to a testing server, i've run into a bunch of problems, my latest is redirection not working.

took testing a step further and created some test functions:

Code:

function redirect(){
redirect('controller/function');
return;
}
function redr(){
header("Location: http://google.com");
exit;
}

both of these work locally, but fail when i move up to testing machine...

i should mention that my local install is on an IIS machine and testing is an apach machine, app structure is a little different too, test machine has app in subdirectory, but config has been updated, and i don't think would affect the header location call...

i'll definately be investing in an apache development machine too, too many problems going from IIS to apache.

any ideas here?