libmyusql.so.6

Hi there: I ve just installed php 4 on my pc, however i have some problems,i have allready compiled php4, and added ADDTYpe etc to the httpd conf file, i have also comented the lines addmodule php3 etc but when i restart the apache server it complains it can find libmysql.so.6. i dont know what it can be can anyone help me??, Also if I comment the lines of php4 and un-comment the lines of php3 it works perfectly. BTW i configured phph 4 with configure --with-mysql=/path/to/mysql --with-apxs thanks in advance