Cesar,
If it downloaded the guide, the antenna was on signal on 101. There's no way for it to magically acquire the data.
You might want to check your settings by this document: http://www.winegard.com/kbase/upload/re ... irectv.pdf
If you use the incorrect setting, it may download the guide and then try to load the HD channels, which the Carryout can't get.
Also, the HR24 is a dual tuner receiver, and thus, will either require a separate cable for each input, or you may run it as a single tuner with one cable but must specify this to the receiver by changing Tuners from Dual to Single on the page where you set your dish type and switch type.
I wouldn't think it would be an activation issue if you're getting the 771 error code, but rather a configuration issue that should be easily fixed by checking everything above.

