ok. see info below:
Again, when I change line #219 on Recordset7 from All records (or 0) to 1 it works ok. It's only when it's more than one of that recordset where it hangs up with a blank page:
$Recordset7 = new WA_MySQLi_RS("Recordset7",$convacc_cx,1);
$Recordset7 = new WA_MySQLi_RS("Recordset7",$convacc_cx,0);
You have to press "Order Complete Quote' green button to get it to add all items in quote to the cart.