HTMLB dont work from www (with iisproxy)

[CertifiedMDiver]

hello

our BSP works perfect from internal call(se80,right click -> testing), BUT all htmlb functions
wont work if i come frome EXTERNAL. the link over iisproxy is working -> i got my bsp, but then when i click an htmlb button, i only got
javascript:void(0) in the left corner, and says there's an error on the page.
i'm working with service and alias (sicf).
how can i tell "him" where are standard htmlb functions to find?

pls. help