broadcom wireless card... what drivers? if you resorted to ndiswrapper...forget injection. hell, even if you didn't it's a crap-shoot. ( /me is NOT a fan of Broadcom ).
also, be sure to check the wiki for (un)success stories on that model, as well as a full site-search on the errors that you are getting.
if that doesn't help, be sure to post all relevant info (errors, etc.) before asking again.