For 48pin-package PSoC3 silicon there are no dedicated XRES pin, but there is an Optional XRES Pin P1 which can either be configured as XRES pin or GPIO. By default P1 is configured as XRES pin, to change this configuration,we need to disable the "Use Optional XRES" option in .cydwr and reprogram the silicon. After program, P1 become GPIO pin .After that ,it can be programmed only in Power Cycle programming mode which can program the silicon without XRES pin. But as for now, only Miniprog3 Rev*B can support this Programming Mode.
Many thanks Athira!
Miniprog3 in Power Cycle programming corrected my mistake.
Now everything is working.