我在Magento堆栈交换站点上发布后找到了答案:

I found the answer after posting on the Magento stack exchange site:

https://magento.stackexchange.com/questions/18098/magento-new -custom-block-module

这是Magento编译器，一旦我禁用了该编译器，它似乎就可以工作了.

It was the Magento compiler, once I disabled the compiler it seems to work.

管理员>系统>工具>编译

Admin > System > Tools > Compilation