PHP and Oracle

Can anybody help me! I've been getting a error message like this for the last few days. Warning: OCIStmtExecute: ORA-01722: invalid number on line 49 Array Every time I try to enter a project using a HTML form Line 49 in apparently the line that says: $result = OCIExecute(ins_statement); Below is the code I am trying to use: //insert relevant values into the project table $insert = "insert into PROJECT values ('$projectID', '$moduleID', $keyID, '$title', '$originator', '$softwareHardware', '$specialSkills', '$status', '$externalAgreement', '$background', '$tasks', '$steps', '$references')"; //formulate the query $query = "select projectID, moduleID, title, originator, softwareHardware, specialSkills, status, externalAgreement, background, tasks, steps, references from PROJECT WHERE projectID='$projectID'"; //parse the two statements $ins_statement = OCIParse ($connection, $insert); $qry_statement = OCIParse ($connection, $query); //execute the first insert statement and print error message if there is an error $result = OCIExecute($ins_statement); if (!$result) { echo OCIError($ins_statement)."<p>"; exit; } //execute the query statement OCIExecute($qry_statement); //retrieve the results of the query statement and present them in the following way while (ocifetch($qry_statement)) { etc.etc.