upgrading from 4.03 to 4.06

Hi there recently I had upgrade my php from as you see in the subject and I have a problem raise after I do some upgrading.... my php script already run OK when I used the previous version after I do the upgrading a lot of error raise here is how I configure ./configure --with-mysql=/usr/local --with-apxs=/usr/local/apache/bin/apxs --enable-memory-limit --enable-ucd-snmp-hack --with-snmp=/usr/local/snmpd --enable-discard-path --enable-force-cgi-redirect --enable-trans-sid the problem is like this.... on the beginning of the script i declare $connectid=mysql_connect(bla,bla,bla); and at the end (still the same page) I used this mysql_db_query($db,"query",$connectid); <------ here is the error come up seems like the $connectid variable that I declare in previous didn't parse till the end.... then I put the $connectid=mysql_connect(bla,bla,bla); before the query then everything is OK...... can any body point me out where did I go wrong...I'm sure my script is OK..it's run in version 4.03 but got error in 4.06 Thanks in Advance Yamin Prabudy