obdc_pconnect problems

Hello, i use php as not a cgi it is include in my apache my odbc is a custom odbc driver so i try to use odbc_pconnect, the first time it connect to the db i saw the connection tcp by netstat and the next time (on the next page) i reuse pconnect with the same db user pass and sql cursor but it open a new connection, i see two connection with netstat ... and more connection if i go another page ... i don't understand why ... see you nicolas.