[stephen]

Hi,

If this issue happen again. Please go to file: app/code/local/Sns/Twen/etc/config.xml find and replace the bellow code:

<admin>
	<routers>
		<adminhtml>
			<args>
				<modules>
					<Sns_Twen before="Mage_Adminhtml">Sns_Twen_Adminhtml</Sns_Twen>
				</modules>
			</args>
		</adminhtml>
	</routers>
</admin>

by:

<admin>
	<routers>
		<twen>
			<use>admin</use>
			<args>
				<module>Sns_Twen</module>
				<frontName>twen</frontName>
			</args>
		</twen>
		<adminhtml>
			<args>
				<modules>
					<Sns_Twen before="Mage_Adminhtml">Sns_Twen_Adminhtml</Sns_Twen>
				</modules>
			</args>
		</adminhtml>
	</routers>
</admin>

Thanks!