Don't work feed

I write the feed address, but I always read 0 posts. http://sitios.upla.cl/contenidos

pressed in but check out all ok, in green
What will be the problem?

Show detailed:

2013-11-12 23:06.28: [STRICT NOTICE] Non-static method WPeMatico_functions::time_cron_next() should not be called statically, assuming $this from incompatible context
2013-11-12 23:06.28: [STRICT NOTICE] Non-static method WPeMatico_functions::update_campaign() should not be called statically, assuming $this from incompatible context
2013-11-12 23:06.28: [STRICT NOTICE] Non-static method WPeMatico_functions::time_cron_next() should not be called statically, assuming $this from incompatible context
2013-11-12 23:06.28: Procesando Fuente http://sitios.upla.cl/contenidos.
2013-11-12 23:06.28: [STRICT NOTICE] Non-static method WPeMatico_functions::fetchFeed() should not be called statically, assuming $this from incompatible context
2013-11-12 23:06.29: Se encontró duplicado ‘http://sitios.upla.cl/contenidos/2013/11/12/ciclo-analizara-distintos-aspectos-de-la-formacion-docente/’: c4c95b31ecb9cf6f83f06796c6d71232
2013-11-12 23:06.29: Filtrando publicaciones duplicadas.
2013-11-12 23:06.29: [STRICT NOTICE] Non-static method WPeMatico_functions::update_campaign() should not be called statically, assuming $this from incompatible context
2013-11-12 23:06.29: [STRICT NOTICE] Non-static method WPeMatico_functions::time_cron_next() should not be called statically, assuming $this from incompatible context
2013-11-12 23:06.29: Campaña analizada en 1 segs.

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