Could it be because there is no styles set to that line of code?
Here is the code I am referencing from WAUE_confirm_3.php:
//WA eCart Show If Start
if (!$sumidrive1->IsEmpty()) {
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <h2 style=\"font-size:medium; margin-bottom:7px; color:<Accent_10 />; /* Accent_10 */ \" >Email Order Receipt</h2>\r\n";
$MailBody = $MailBody . "<h3 style=\"font-size:small; margin:2px 0; color:<Text_Dark />; /* Text_Dark */\" >Order number: ";
$MailBody = $MailBody . ((isset($_SESSION["sumidrive1_OrderID"]))?$_SESSION["sumidrive1_OrderID"]:"");
$MailBody = $MailBody . "</h3>\r\n";
$MailBody = $MailBody . "<p style=\"font-size:x-small; margin:2px 0; color:<Global_Gray />; /* Global_Gray */\">Thank you for your order. Please allow 5-7 business days for delivery.</p>\r\n";
$MailBody = $MailBody . " <table style=\"font-size:x-small; background-color:#E0E8F0; /* BG_Light */\" width=\"100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\r\n";
$MailBody = $MailBody . " <tr>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:left; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Name</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:left; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Description</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:left; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Size</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:left; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Color</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:right; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Price</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:center; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Quantity</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <th style=\" padding:10px 14px 10px 7px; vertical-align:top; text-align:right; background-color:#E5F385; /* Accent11 */ color:#222847; /* Text_Dark */\">Total</th>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . " </tr>\r\n";
$MailBody = $MailBody . " ";
while (!$sumidrive1->EOF()) {
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <tr>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top;\" >";
$MailBody = $MailBody . $sumidrive1->DisplayInfo("Name");
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top;\" >";
$MailBody = $MailBody . $sumidrive1->DisplayInfo("Description");
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top;\" >";
$MailBody = $MailBody . $sumidrive1->DisplayInfo("Size");
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top;\" >";
$MailBody = $MailBody . $sumidrive1->DisplayInfo("Color");
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top; text-align:right;\" >";
$MailBody = $MailBody . WA_eCart_DisplayMoney($sumidrive1, $sumidrive1->DisplayInfo("Price"));
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top; text-align:center;\" >";
$MailBody = $MailBody . $sumidrive1->DisplayInfo("Quantity");
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . "\r\n";
$MailBody = $MailBody . " <td style=\"padding:10px 14px 10px 7px; vertical-align:top; text-align:right;\" >";
$MailBody = $MailBody . WA_eCart_DisplayMoney($sumidrive1, $sumidrive1->DisplayInfo("TotalPrice"));
$MailBody = $MailBody . "</td>\r\n";
$MailBody = $MailBody . " \r\n";
$MailBody = $MailBody . " </tr>\r\n";
$MailBody = $MailBody . " ";
THANKS!