undefined indexes displayed on my pligg sites

[hejunjie621]

Hi,

When i finished installing the pligg and run it even at the first time, I found a few of comments displayed on the sites. It tell that different indexes contained in PHP files in template_c directorty are undefined. I can not solve it at all. I could not find if they are defined. My site look very urgly. Could you tell me how to matter it.

Thank you very much.