I am having trouble setting up my treasury for php.

Here is the link that i click to test the IPN file, but it is incorrect because it uses the root directory of the entire site, instead of the sub folder in which nuke is installed:

http://www.strifex.com/modules/Donations/ipn/ipnppd.php

instead of:

http://www.strifex.com/main/modules/...ipn/ipnppd.php

I was wondering how i change that?

Thanks