error on integration of epc into wp widget

[muttenz23]

i am new to ecp and wp. i am trying to integrate epc into a sidebar in wp. i use exec-php to insert into text fields. when inputting the php i get the following error in the widget section of the admin page of wp:

Warning: require(calendar/calendar.php) [function.require (http://www.jewishtlv.org/wp-admin/function.require)]: failed to open stream: No such file or directory in /home/name/public_html/wp-content/plugins/exec-php/includes/runtime.php(42) : eval()'d code on line 1

Fatal error: require() [function.require (http://www.jewishtlv.org/wp-admin/function.require)]: Failed opening required 'calendar/calendar.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/name/public_html/wp-content/plugins/exec-php/includes/runtime.php(42) : eval()'d code on line 1

despite this error the calendar actually shows up in the sidebar on the website, but the error can no longer be removed from the widget section in the admin page.

any ideas what i am doing wrong?

[ve9gra]

View my site EPC Tutorials (http://www.epctutorials.com/). There is a two part post on how to integrate EPC in WP.