error after activating the joomla cache

Hi,

I have enabled the joomla cache. As not send messages from the contact form I followed these instructions:

http://www.chronoengine.com/forums/posts/f3/t86744.html

But now I get the following error (attached image) above the shipping confirmation message.

How I can fix the problem?

thank you very much

Max

HI Max,

That's a PHP Notice, not an error, you can hide it by setting your site Error Reporting to System Default or to None in the Site Global Configuration.

Bob