Some nodes display error message..

Some of my nodes display error message about relatedlink.
One of them:
http://www.esoft.web.id/utilities/free-removeit-pro-v4-se-10.30.2007.html

http://www.esoft.web.id/utilities/free-zipeg-2.0.0.777.html

But not all nodes.

Object of class stdClass could not be converted to string in /home/esoft.web.id/modules/relatedlinks/relatedlinks.module on line 1093.

please help me..
Thanks.. before..