Some guys here are really good in checking your schematic. Please upload it here. What programmer are you using?
it really is the same as the the schematic circuit diagram from cypress, which i've attached a link http://www.cypress.com/file/232296/download. We are using the SW signals, XRES, VDDD and GND signals from the 10 x 2 header (J2) from the development kit board, pins 2,4,6,8 and 10 to program our device through a header. We've checked for shorts on the board and checked the cable running from the header to our device.
You need at least 5 signals to program your PSoC:
Did you remove the connection from J2 to the original PSoC? Having 2 chips in parallel will not work.
I usually use the 5-pin interface, a miniprog2 or a kitprog to program external modules.