Error: %1 is not a valid Win32 application. in node-webkit 0.12.1 win32

chilkat for nodejs

environment:node-webkit (nw) 0.12.1

code : require("chilkat_win32")

Error: "%1 is not a valid Win32 application. E:nwjs-v0.12.0-win-ia32node_moduleschilkat_win32chilkat.node"

who can help me to solve this problem?