IIS controlling behaviors?

Greetings-

A quick question (I hope) regarding IIS and DHTML behavior (.htc)
files.

The problem is after migrating web sites to a new server, the treeview
control (from IE web controls) no longer works. All that is put to the
screen is the tree node text. It appears that the behaviors are not
loading.

We've checked the folder locations and have even re-built the web
controls per the instructions with no luck.

My high-level question regarding IIS is there any settings on the
server that will control or affect how/when behavior files are
downloaded or consumed by the client?

I can provide more detail if needed, but am hoping there is a setting
we have over looked.

Any help or insight is appreciated!

Thanks

Thanks Kristofer-

Checking the logs pointed me in the right direction. It turns out that
permissions were to blame. Our root folder was not set correctly, so
when adding the webctrl_client/ and subfolders they didn't inherit the
necessary permissions- read: anon user didn't have access... causing
the 401 sc_status codes on requests to the treeview.htc (and other)
files.

Thanks!
Rob