they are installed as internal libraries. Just update to 10.7. okhttputils2 is installed as a internal Library.
Edit: ohh, i just saw you are using the old library.
In meantime I replaced httputils2 with OkHttpUtils2 and found why I got this strange error.
Inside my project I creatd an "Activity" namend "Parameters". This was the wrong way, since "parameter" seems to be used by the library.