When printing nodes in block, page becomes unavailable

I am trying to display the related content in a column on the right of my main content. I used the code from the documentation to paste into a block that displays the full node with all it's fields. I then went into my tpl file and started modifying what will display for it and all was working fine. Then After I attempted to relate nodes to another article, they both became unavailable. The browser gave an unknown error. I think drupal or mysql might be choking, but I'm not sure.

Is there a better way to accomplish what I am doing? I need to have control over what fields show, and like I said I can do this, but it seems hacky and obviously is crashing my pages.

This module is not useful just displaying the title of a node, so it is imperative I get this working. Any help would be greatly appreciated. Thank you.