ok. so installation has been a breeze, and there aren't any issues with the actual WP install.

however, when a user logs into zencart, they get this:

Fatal error: Call to undefined function: vtu_checkuserws() in /home/soapdish/public_html/soapdish/includes/classes/observers/class.loginWordPress.php on line 27

they get a similar error when they register, although in either case, simply refreshing shows that you are both logged in and everything appears as it should.

line 27, FYI is this:
vtu_checkUserWS($email, $inCart);

vtu_checkUserWS appears in one other place...

line 33 of class.registerWordPress.php
vtu_checkUserWS($email, true);


any ideas? the site is www.prettybabynaturals.com/soapdish