Event calender not working, need to add filter but dont know where

i have an event calander from kublabs that i have adapted. the detail page shows the correct event based on the filtering the event_id

but the prblem i am having is i have a query thats send the event to the shopping cart but it is not selecting the correct varialble. I dont know how to say i want the variable that has been passed by the calander - event_id='$_GET[id]'

<?

require_once("includes/config.php");

$db_connection = mysql_connect ($DBHost, $DBUser, $DBPass) OR die (mysql_error()); 

$db_select = mysql_select_db ($DBName) or die (mysql_error());

$db_table = $TBL_PR . "events";

$query = "SELECT * FROM $db_table WHERE event_id='$_GET[id]' LIMIT 1";

$query_result = mysql_query ($query);

while ($info = mysql_fetch_array($query_result)){

    $date = date ("l, jS F Y", mktime(0,0,0,$info['event_month'],$info['event_day'],$info['event_year']));

    $time_array = split(":", $info['event_time']);

    $time = date ("g:ia", mktime($time_array['0'],$time_array['1'],0,$info['event_month'],$info['event_day'],$info['event_year']));

?>

//  *** Add item to Shopping Cart via link ***

$XC_AddLink1 = $_SERVER["PHP_SELF"];

if (!isset($XC_newQS) || $XC_newQS == "") {

  $XC_AddLink1 .= "?XC_AddId1=";

} else {

  $XC_AddLink1 .= "?" . $XC_newQS . "&XC_AddId1=";

}

$XC_uniqueCol1="event_id";

if (isset($_GET["XC_AddId1"])) {

  $NewRS=mysql_query($query_rsEvent, $lotties) or die(mysql_error());

  $ln = "1";

  $XC_rsName="rsEvent";

  $XC_uniqueCol = "XC_uniqueCol$ln";

  $XC_redirectTo = "../already-added.php";

  $XC_AddViaLinkRedirect = "../shopping-cart.php";

  $XC_BindingTypes=array("RS","LITERAL","RS","RS","NONE");

  $XC_BindingValues=array("event_id","1","event_title","event_price","");

  $XC_BindingLimits=array("","","","","");

  $XC_BindingSources=array("","","","","");

  $XC_BindingOpers=array("","","","","");

  require_once('XCInc/AddToXCartViaLink.inc');

}

?>

i need to tell the

$XC_uniqueCol1="event_id";

to use the  event_id='$_GET[id]'

in order to pass the correct information

i should also include the fact that the //  *** Add item to Shopping Cart via link *** is getting its information from a different SQL

mysql_select_db($database_lot, $lot);

$query_rsEvent = sprintf("SELECT * FROM calendar_events WHERE event_title = %s", GetSQLValueString($colname_rsEvent, "text"));

$rsEvent = mysql_query($query_rsEvent, $lotties) or die(mysql_error());

$row_rsEvent = mysql_fetch_assoc($rsEvent);

$totalRows_rsEvent = mysql_num_rows($rsEvent);