captcha

you are using the wrong session variable in the Like Entry validation.
the following code creates the captcha image:
<img src="webassist/captcha/wavt_captchasecurityimages.php?field=Contact_Us_group_3_field&amp;font=fonts/MOM_T___.TTF" alt="Security Code" class="Captcha">


the image source goes to the wavt_captchasecurityimages.php file and sends a number of URL variables, the file is the field variable:

field=Contact_Us_group_3_field

this variable is used to set the name of the captcha session variable as:
captcha_<field value>

so in this case the session name is:
captcha_Contact_Us_group_3_field

in the like entry validation, you are using a session named captcha_Contact_Us_group_3_field_2 instead:

$WAFV_Errors .= WAValidateLE((strtolower(isset($_POST["Contact_Us_group_3_field_2"])?$_POST["Contact_Us_group_3_field_2"]:"")) . "",((isset($_SESSION["captcha_Contact_Us_group_3_field_2"]))?strtolower($_SESSION["captcha_Contact_Us_group_3_field_2"]):"") . "",true,6);


change that code to use the captcha_Contact_Us_group_3_field session:
$WAFV_Errors .= WAValidateLE((strtolower(isset($_POST["Contact_Us_group_3_field_2"])?$_POST["Contact_Us_group_3_field_2"]:"")) . "",((isset($_SESSION["captcha_Contact_Us_group_3_field"]))?strtolower($_SESSION["captcha_Contact_Us_group_3_field"]):"") . "",true,6);