PHP Extension : Debuging warning

Hi~
I wrote a php extension with vs2008.
I inserted breakpoint in the source file and pressed F5 to debuging the extensiong. A warning message box was jumped out.

PHP Startup:myphpext:Unable to initialize module
Module compiled with build ID=API20090626,TS,VC9
PHP compiled with build D=API20090626,TS, debug, VC9
These options need to match

It seems that the myphpext extension is not debug version.
But I already set the properties of the project /Zi and /DEBUG.

What should i do?
Help me~

Build it using the "Debug" configuration?