100% repeatable problem with PHP 4.0.1 in WIN2k environment.

Hi, I am able to produce the following problem 100% in WINDOWS. Problem is u can not produce success message in new browser context .. Error: php.exe has generated some errors and will be closed by windows. I am facing this problem from last 1 year. Files Login.html ====================== <!DOCTYPE html public "-//w3c//dtd html 4.0 transitional//en"> <html> <body ONLOAD="document.login.emp_id.focus()"> <font face="arial" > <br><br><center> <h1> WELCOME TO LOGIN PAGE </h1></center><br><br> <center> <form name="login" method="post" action="./authentication.php"> <table border="0" width="100%"> <center> <tr><td width="50%" align="right"><b><font size="2" face="Arial">Employee No&nbsp;</font></b></td><td width="5%"></td><td width="50%"><input type="text" size="10" name="emp_id" maxlength="10" value=""></td></tr> <tr><td width="50%" align="right"><b><font size="2" face="Arial">Password&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></ b></td><td width="5%"></td><td width="50%" ><input b>type="password" size="10" name="emp_pass" maxlength="10" value=""></td></tr> <tr> <td width="50%" align="right"> <p align="left"> </td> <td width="5%"> </td> <td width="50%"> <p align="left"> <input type="submit" Value="LOGIN"></td> </tr> </center> </table> </center> </form> </body> </html> =============================== Authentication.php ==================================== <?php // Connect to MySQL if (isset ($HTTP_POST_VARS{"emp_id"}) && isset ($HTTP_POST_VARS{"emp_pass"})) { $connection=mysql_connect( 'localhost', 'balaji', 'pingpong' ) or die ( 'Unable to connect to server.' ); // Select database on MySQL server mysql_select_db( 'amerm' ) or die ( 'Unable to select database.' ); // Formulate the query $sql = "SELECT * FROM employee WHERE emp_id = '$emp_id' AND emp_pass = PASSWORD('$emp_pass')"; // Execute the query and put results in $result $result = mysql_query( $sql ) or die ( 'Unable to execute query.' ); // Get number of rows in $result. $num = mysql_numrows( $result ); if ( $num != 0 ) { $row = mysql_fetch_object($result); // A matching row was found - the user is authenticated. //start a new session by registering the employee number. session_start(); session_register("user","pw"); $user=$emp_id; $pw =$emp_pass; //This is the value from employee table ..just simplified for simulating this problem $n=2; if ($n=="2") { //close mysql connection mysql_close($connection); header("Location: success.php"); exit; } } else { //close mysql connection mysql_close($connection); //User does not exist or not authenticated. header("Location:not_authorized.html"); exit; } } else { //User does not exist or not authenticated. header("Location:wrongusage.html"); exit; } ?> ================================================= Success.php ======================================== <?php echo "you have logged in successfully!!!!!<br>"; echo "Session variables<br>"; echo $HTTP_SESSION_VARS["user"].$HTTP_SESSION_VARS["pw"]; ?> ======================================= Can anybody tell me what is causing the problem. Any help would be very appreciable. Thanks in advance Balaji

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