安装Magento connect Manager时出错

Question

当我通过magento connect manager安装一些插件时，它显示了一些问题如下：

WARNING: channel "connect.magentocommerce.com/community" has updated its protocols, use "channel-update connect.magentocommerce.com/community" to update 
downloading ZizioGroupSale-1.2.1.tgz ... 
Starting to download ZizioGroupSale-1.2.1.tgz (92,626 bytes) . . . . . . . . . . . . . . . . . . ...done: 92,626 bytes
ERROR: failed to mkdir /home/onlyforc/public_html/app/code/community/Zizio/Groupsale/Block/Adminhtml

如何让它更容易？