PHP broken pipe in fork

Hi, i'm using firebird 1.5.1 on a linux machine with a php script I'm using a query in loop and go through all records to do some operations in the middle of the script i fork(); to do other things When i return to the parent process i try to make one update and i get the following error [nativecode=Unable to complete network request to host "127.0.0.1". Error writing data to the connection. Broken pipe] And continue the loop of the records of the query. It apears that the fork and the wait from pcntl closes the sockets to the database. Is this a regular beaviour ? How can it be solved ? I'm using Pear DB for database access. Thank you in advance Rui Francisco