Bought EasyPHPCalendar but won't install properly

[jmcdevitt]

Hello I purchased EasyPHPCalendar for a client and went to install it auto install ion cube...everything installed fine and the test was fine however when it directed me to /calendar/setup/index.php?locale=en_US it gave me this error message...

Warning: main(functions/categories.php) [function.main]: failed to create stream: No such file or directory in /home/www/alphamedicadev/oncall/speakers/calendar/calendar.php on line 50
Warning: main(functions/categories.php) [function.main]: failed to create stream: No such file or directory in /home/www/alphamedicadev/oncall/speakers/calendar/calendar.php on line 50
Warning: main(functions/categories.php) [function.main]: failed to create stream: No such file or directory in /home/www/alphamedicadev/oncall/speakers/calendar/calendar.php on line 50
Fatal error: main() [function.main]: Failed opening required 'functions/categories.php' (include_path='') in /home/www/alphamedicadev/oncall/speakers/calendar/calendar.php on line 50

Sorry if I have failed to see if this has been posted before. I couldn't find it. Please help I need to get this up and running today for a deadline first thing in the morning.