I make a mistake with step 2,It is append not replace.
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2. And in file admin/configuration.php
find:
tep_db_query("update " . TABLE_CONFIGURATION . " set configuration_value = '" . tep_db_input($configuration_value) . "', last_modified = now() where configuration_id = '" . (int)$cID . "'");

Append below:
// UPDATE CACHE by jason chuh
updateConfiguration();
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Thanks Debs


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