Using php5ts.lib in 5.3.0beta2-dev snapshot

Hello, I am using the 'php5ts.lib' file included in the "VC9 x64 Thread Safe" 5.3.0beta2-dev snapshot (from http://windows.php.net/snapshots/), downloaded 2009-Mar-15, to build a module...but when I try to load the module using those same PHP binaries I get the following error:

php -v

    PHP Warning:  PHP Startup: MapScript: Unable to initialize module

    Module compiled with build ID=API20090115,TS
    PHP    compiled with build ID=API20090115,TS,VC9
    These options need to match

Is it possible that the 'php5ts.lib' file included in that snapshot was not used to make those binaries? Or, does someone see my mistake? (where is this mysterious "VC9" ID coming from?) thanks for any advice. -jeff -- Jeff McKenna FOSS4G Consulting and Training Services http://www.gatewaygeomatics.com/