flash php GET

I have made a flash menu for my sidebar
and I want to link to stuff like catgories and pages etc…
in my flash i’m using getURL("?page_id=43","_self","GET");

i have tried various methods like hardcoding the whole url and using "index.php?page_id=43" and so forth however when i click the buttons all that happens is index.php gets reloaded. I made it work using getURL("?page_id=43","GET");
however it loads the page in a new window… as soon as i put _self in there the same problem reoccurs.. is there any way i can get around this??