Stop using old version, use new ones which supports that function you want.
Yangers101, you’ll have to upgrade to the latest version of BP 1.1 like socialpreneur mentioned.
I’ve been avoiding upgrading because I’m afraid that my custom template is gonna be off, but I guess i just have to suck it up and figure it out. thanks
I seem to recall using this with success on an old pre-1.1 install to make that happen : https://wordpress.org/extend/plugins/cosmic-bp-user-signup-password/
Well,Just to let you people know,I had written this plugin for buddypress 1.0.X version and It works upto buddypress 1.0.3.I last tested it(on request of one of user) for buddypress 1.0.3+wpmu 2.8.4a and It was working.
So hopefully,It will solve your issue if you are using buddypress 1.0.3
But again,because of security reasons It is strongly recommended to upgrade to most recent version of wpmu+buddypress.