(SL) Problem loading a guest in SL6.1

[El cucu007]

Dear users,
I have been faced with the problem in which I am loading a paravirt guest in
a SL6.1 box, I am trying to do the http, nfs install and they both failed to
retrieved the packages and anaconda, all I can see is "retrieving..." but
nothing gets retrieve. Any ideas as to what can be wrong in the guest
installing is greatly appreciated.