布局不在layout.xml中呈现

I have created a custom module and called my layout.xml file in config.xml

This is the code of my layout.xml file

<?xml version="1.0"?>   
<layout version="0.1.0">   
  <cartpdf_index_index>   
    <reference name="root">   
      <action method="setTemplate"><template>page/1column.phtml</template></action>   
    </reference>   
    <reference name="content">   
      <block type="cartpdf/index" name="cartpdf_index" template="cartpdf/index.phtml"/>   
    </reference>   
  </cartpdf_index_index>  
</layout>  

When I check cartpdf index controller using die() it works even it sets the layout of the page 1column, 2columns-left whatever you set. but it doesn't call phtml file in content area.

I checked this module in my local system in fresh Magento and its working fine there but not in server.

What could be possible problem for that?

It was compilation mode on issue. I disabled that and now its working fine.