The CY8C24794 is a PSoC1. It can only be built using PSoC Designer.
The PSoC Creator can compile ALL PSoC3s, PSoC4s, PSoC5s and many PSoC6s. It can also work with a few other Cypress products like the Traveo-series.
In this case, I will focus on using the PSOC designer. Thanks for your helping.