Changes in internal Programmsructure ZEND-Api from 4.0b2->3

Cheers everybody, I was about to write a module for a customers Database, as b3 Showed up. The module was kind of ready and should dynamically be loaded through the extension mecanism in php.ini : extension=php_pacs.so now starting Apache(with b3 in it) results in a Crash : the dlopen() in ext/standart/dl.c:105 call to load my module failed (the errormessage returnable through dlerror was : ...php_pacs.so: undefined symbol: zend_register_string_constant ) parsing that Error results in folowing stack : (gdb) bt #0 0x8064ebe in sapi_apache_send_headers (sapi_headers=0x817a034) at mod_php4.c:184 #1 0x806b620 in sapi_send_headers () at SAPI.c:287 #2 0x809dea8 in php3_header () at head.c:386 #3 0x80b6a99 in php_ub_body_write (str=0x8131bea "", str_length=0) at output.c:336 #4 0x80b6792 in php_body_write (str=0x8131bea "", str_length=0) at output.c:148 #5 0x8065ae2 in php_error (type=16, format=0x81425a0 "Unable to load dynamic library '%s' - %s") at main.c:454 #6 0x80952a7 in php_dl (file=0xbfffebc0, type=1, return_value=0xbfffeb6c) at dl.c:118 .....#10 my makefile looks like this : LD=gcc -L[...] -ldl -shared -rdynamic crashing the httpd should not be the result of failing to load a module ?