Greetings....
I am a "newbie" to LimeSurvey, using version 1.53+. I have created a survey and have 117 invited participants. There have been 33 responses so far. I tried to view the statistics of the responses received so far. When I click on the pie chart icon ("getting statistic from these responses"

the following text/code is displayed:
"Warning: require_once(/home1/madwesto/public_html/survey/src/jpgraph.php) [function.require-once]: failed to open stream: No such file or directory in /home1/madwesto/public_html/survey/admin/statistics.php on line 27
Fatal error: require_once() [function.require]: Failed opening required '/home1/madwesto/public_html/survey/src/jpgraph.php' (include_path='.:/usr/lib/php:/usr/local/lib/php'
in /home1/madwesto/public_html/survey/admin/statistics.php on line 27"
Can anyone give me a tip what is wrong, and what I need to do to fix?
Thanks for your help.