I just upgraded the JEvents component to 1.5.5f_b1887. I also replaced the plg_jevents_search with new 1.5.6_b1869.

The calendar shows up OK but when I click on a date with an event, I get the following error:
Calendar of Events (all)

Warning: require_once(/home/gnpa/public_html/components/com_mailto/helpers/mailto.php) [function.require-once]: failed to open stream: No such file or directory in /home/gnpa/public_html/components/com_jevents/views/default/helpers/defaultviewhelperheader.php on line 105

Fatal error: require_once() [function.require]: Failed opening required '/home/gnpa/public_html/components/com_mailto/helpers/mailto.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/gnpa/public_html/components/com_jevents/views/default/helpers/defaultviewhelperheader.php on line 105
Events Calendar

I may have missed something but all the plugins are published and the com is working fine. I have also cleared the cache on the server and on the browser but get the error.

Can you point me to a solution? Thanks for the help.