Why is my $headerinclude modify'er plugin not working?

[carcomp]

I've got some code to modify $headerinclude. It works like this...

$headerinclude .='

MYCODE

';

I have tried almost every hook location.. global_start, global_complete, init etc. Only two work. forumdisplay_complete and forumhome_complete. Whats up with this? I want to modify the $headerinclude variable all the time, not only on those two pages.

[Dismounted]

Using global_setup_complete should work.

[RG_LunAnder]

hmm... shouldnt it be $headinclude instead of $headerinclude?