I hope you don't have Colorstream Pro inputs as apparently these are proprietary Toshiba inputs which only work with a specific Toshiba DVD player:
http://www.smr-archive.com/forum_6/messages/1347.shtml
From second reply to this:
"Toshiba's component video inputs will accept other component video inputs. The difference, however, is that to use the Colorstream PRO inputs, if your set has them, you must use the Colorstream PRO outputs from a Toshiba DVD; specifically, the 7108. Not all Toshiba sets have these inputs, only 3 models do, I believe. You should check the Toshiba website to be certain. Your source may be confused between these two types of inputs.
In the former case, you see the typical component video resolution. In the latter case, you take advantage of a Toshiba-proprietary system that functions effectively like a line doubler and produces the essential equivalent of a 480P progressively scanned image, which should be much better."
AC