Joomla Extension Installation

I need to install a simple module into Joomla and every one I try I get the same error message when trying to install: ERROR: Could not find an XML setup file in the package. I have no idea what this error is, since every module I try to install it tells me that same damn thing. I just need to install this comment script. Joomla comment 3.1.0 [login to view URL],com_mtree/task,viewlink/link_id,3301/Itemid,35/ this should be a no brainer for someone familiar with Joomla. Not only do I need this installed, I need you to figure out why the error message for every module attempted. thanks, ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform windows