including a header

[lebanon]

In earlier vb versions i used to add an obstart in headinclude and it worked fine
now as suggested i used in global start plugin i did add
include ("location");
i also tried an echo
nothing is happening

My header for all website pages should look the same and i do not want to add it manually each time i update something in header to the templates !
What could be preventing the parsing of the above line of code ?