very thanx jason for this help now the error in cart.php after i add <pre><?php var_dump($_SESSION); ?></pre>
is
array(3) {
["WAVT_detail_Errors"]=>
string(0) ""
["eCart1_Items"]=>
string(120) "1|WAECART|Avobath|WAECART||WAECART|0|WAECART|1|WAECART|29|WAECART|Avobath.jpg|WAECART|0|WAECART|29|WAECART|1 Avobath (1)"
["WAEC_ContinueRedirect"]=>
string(16) "/detail.php?ID=1"
}