Error when activating Addon

Hi,
I've installed Uber cart and all other required modules.

However, when I go to activate the Hotel Booking System, I get the error:
Fatal error: Call to undefined function content_field_instance_read() in /home/hathers1/public_html/brynmoorhouse/111/modules/jquery_ui/jquery.ui/ubercart/uc_product/uc_product.module on line 2036

(Line 2036 reads: $instances = content_field_instance_read(array('field_name' => $field_name, 'type_name' => $type)); )

and then I get

    user warning: Table 'hotel_booking_rates' already exists query: CREATE TABLE hotel_booking_rates ( `hbrid` INT unsigned NOT NULL auto_increment, `name` VARCHAR(255) DEFAULT NULL, PRIMARY KEY (hbrid) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_occupancy_modifiers' already exists query: CREATE TABLE hotel_booking_occupancy_modifiers ( `hbomid` INT unsigned NOT NULL auto_increment, `threshold` INT unsigned NOT NULL DEFAULT 0, `type` VARCHAR(1) DEFAULT 'A', `rate` DECIMAL(9, 3) unsigned NOT NULL DEFAULT 0, PRIMARY KEY (hbomid), INDEX hotel_booking_occ_mod_type_ix (type) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_rate_modifiers' already exists query: CREATE TABLE hotel_booking_rate_modifiers ( `hbrmid` INT NOT NULL auto_increment, `method` VARCHAR(1) DEFAULT 'P', `rate` DECIMAL(9, 3) unsigned NOT NULL DEFAULT 0, PRIMARY KEY (hbrmid) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_rate_calendars' already exists query: CREATE TABLE hotel_booking_rate_calendars ( `hbrid` INT unsigned DEFAULT NULL, `calendar_dt` DATETIME DEFAULT NULL, `rate` DECIMAL(9, 3) unsigned NOT NULL DEFAULT 0 ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_availability_calendars' already exists query: CREATE TABLE hotel_booking_availability_calendars ( `nid` INT unsigned NOT NULL, `calendar_dt` DATETIME NOT NULL, `available` TINYINT NOT NULL DEFAULT 0, `minimum_occupancy` TINYINT unsigned NOT NULL DEFAULT 0, `minimum_stay` TINYINT unsigned NOT NULL DEFAULT 0, `no_check_in` TINYINT unsigned NOT NULL DEFAULT 0, `no_check_out` TINYINT unsigned NOT NULL DEFAULT 0, INDEX hotel_booking_avail_cal_min_stay_ix (nid), INDEX hotel_booking_avail_cal_no_check_in_ix (no_check_in), INDEX hotel_booking_avail_cal_no_check_out_ix (no_check_out), INDEX hotel_booking_avail_cal_min_occ_ix (minimum_occupancy), INDEX hotel_booking_avail_cal_cal_dt_ix (minimum_stay), INDEX hotel_booking_avail_cal_nid_ix (nid) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_room_occupancy_modifiers' already exists query: CREATE TABLE hotel_booking_room_occupancy_modifiers ( `nid` INT unsigned NOT NULL DEFAULT 0, `hbomid` INT unsigned NOT NULL DEFAULT 0, INDEX hotel_bkg_room_op_mod_nid_ix (nid) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_reward_memberships' already exists query: CREATE TABLE hotel_booking_reward_memberships ( `order_id` INT unsigned NOT NULL DEFAULT '0', `member_number` VARCHAR(255) DEFAULT NULL, PRIMARY KEY (order_id) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.
    user warning: Table 'hotel_booking_room_types' already exists query: CREATE TABLE hotel_booking_room_types ( `nid` INT unsigned NOT NULL DEFAULT '0', `vid` INT unsigned NOT NULL DEFAULT '0', `capacity` INT unsigned NOT NULL DEFAULT '0', `hbrid` INT unsigned NOT NULL DEFAULT '0', `hbrmid` INT unsigned NOT NULL DEFAULT '0', `smoking` TINYINT unsigned NOT NULL DEFAULT '0', `minimum_occupancy` INT unsigned NOT NULL DEFAULT '0', `default_available` INT unsigned NOT NULL DEFAULT '0', `model` VARCHAR(255) DEFAULT '', `from_rate` DECIMAL(6, 3) unsigned NOT NULL DEFAULT 0, PRIMARY KEY (vid), UNIQUE KEY hotel_booking_room_types_nid_vid_ix (nid, vid), UNIQUE KEY hotel_booking_room_types_nid_ix (nid) ) /*!40100 DEFAULT CHARACTER SET UTF8 */ in /home/hathers1/public_html/brynmoorhouse/111/includes/database.inc on line 555.

when I next login.

Any ideas how I can fix this? I'm using Drupal 6.19