philips cinema lcd

Why can not I get a picture on my TV / Cinema surround sound through an HDMI cable?
I have Sky + and Philips Cinema surround connected Samsung LCD TV. The Sky + is connected to the TV via SCART connection EXT and cinema surround the Philips AV output connected to Sky + and HDMI on the TV. When playing a DVD movie on my surround sound but no picture. Both on TV and around Philips Compatible with HDMI. Please can someone help?
You does not need the SCART connection, disconnect it.Hope assistance information.
Xbox en Philips Cinema 21:9