PLEASE: Remove space between Entry and Postmetadata.

Dear all please can you help me.

I’d like to get rid of the space that appears between “entry” data and the “postmetadata” in posts on my templates. See my problem at the following URL:

https://www.designoptimisation.com/personal/snippet.gif

I would like to remove the space between the text area highlighted in RED and the text area highlighted in YELLOW.

I have tried to use the style sheet and the index.php but I can’t find the offending peice of code. Is it a margin somewhere? Can anybody help?

Thanks very much in advance.