BuddyPress.org

You are using a custom theme as soon as you do that you enter a new realm and need to know what you are doing, this particular theme Suffusion uses a custom menu of some description and BP directory menu items will not be included by default. BP hard codes these menus links in header.php (soon to change to WP nav menus)

You! have to do a little manual work in getting things to work and need to understand how both Suffusion and BP work, this act of trying to get BP to use any old WP theme is not a natural one.

In all honesty you have simply asked this question in entirely the wrong place – and perhaps I should have said this much earlier – The correct place to have addressed these issues would have been to the theme home, Suffusion has it’s own support and if you had asked there would probably have had this wrapped up and solved in no time. Strictly speaking this site supports BP and BP default theme it can’t be expected to support digressions and third party implementations – other than the plugins that have a group support home on the site.

I looked through suffusion support for you and quickly got an impression of what may be wrong however this is not something I ought to be doing for anyone

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