php_pgsql.dll problem

Hello, i'm trying to use php with postgres on win32 i have found some problems with php 4.3.1 (same for php 4.3.0) and php_pgsql.dll. When i try to load php_pgsql.dll extension in php.ini i get error notice PHP Warning: Unknown(): Unable to load dynamic library 'C:\Program Files\php\extensions\php_pgsql.dll' - The specified procedure could not be found. file php_pgsql.dll exists. I have found on internet that this problem can be caused by missing libpq.dll from postgres distribution so i downloaded postgresql-7.3.1 and compiled with VC5.0 interface libpq and copied libpq.dll and libpq.lib and copied it to winnt/system32 folder (i tried php dll extensions dir as well) but i still have same warning and pg_* functions are not avilable. Your help is very appreciated Peter Kmet --