You have to hack a php file directory.
blocks/pical_coming_schedule.php
// setting properties of piCal
$cal->conn = $xoopsDB->conn ;
include( "$mod_path/include/read_configs.php" ) ;
$cal->base_url = $mod_url ;
$cal->base_path = $mod_path ;
$cal->images_url = "$mod_url/images/$skin_folder" ;
$cal->images_path = "$mod_path/images/$skin_folder" ;
$block = $cal->get_blockarray_coming_event( "$mod_url/index.php" , $maxitem , true , $untildays ) ;
if( $block['num_rows'] <= 0 ) {
return array() ;
}
return $block ;
}