Apache2.0.36 + PHP4.3.0 SAPI mod fails while + PHP4.2.1 works OK

I'm running on WIndows Me & I've upgrated PHP 4.2.1 to PHP 4.3.0 (both binary distr for Windows). Separately php.exe works well, but using php4apache2.dll with Apache 2.0.36 (Win binary dist) fails with err ERROR_GEN_FAILURE (31) message "Cannot load D:/server/PHP/sapi/php4apache2.dll into server" on "LoadModule php4_module d:/server/php/sapi/php4apache2.dll", while old PHP as SAPI module works normally with the same configuration. I'm sure all dlls are on path (both Apache's & PHP's - I add ALL dirs & subdirs to be sure), I've not loaded any extensions in my php.ini & tried to use the default configuration too. At least, somebody say, where (by what function in Apache's, Window's or PHP's DLLs) this error can be raised: I've got functions call tracer, but both it & my machine are too slow to log EVERY function call in EVERY lib.