OCIStmtExecute: ORA-01008: not all variables bound on Anonymous PL/SQL

I have the sample php program. While trying to execute, I get the above mentioned error. SQL> create type typ_numbertab TABLE OF number(12); % cat mytest.php -----------------------------Program Begins-------------------------------- #!/usr/local/php4/bin/php -q <? $dept = array(10,20,30,40); $db = OCILogon("scott","tiger"); $arr = OCINewCollection($db,'TYP_NUMBERTAB'); $sqlstmt = " -- declare -- :dept TYP_VARCHARTAB ; begin forall i in 1..:dept.count insert into t values (:dept(i)); end;"; $stmt = OCIParse($db,$sqlstmt); while (list(,$v) = each($dept)) { $arr->append($v); } $bnd = OCIBindByName($stmt,':dept',$arr,32,OCI_B_SQLT_NTY); OCIExecute($stmt); ?> -----------------------------Program Ends---------------------------------- % mytest.php <br /> <b>Warning</b>: OCIStmtExecute: ORA-01008: not all variables bound in <b>mytest.php</b> on line <b>25</b><br /> Can someone tell me what is it complaining about and how to fix this? Thanks,