Cart not displayin FedEx Ground

I just noticed that on two of my carts the display of Fedex ground shipping is not there...I do see Fedex Express. I can understand one store having the issue but not two.

does anyone know if the code has changed or the targeted addess it goes too has changed?

running zen 1.9h and 1.8 on other cart

thank you

Which FedEx Add On do you have installed?

What is the weight when it does not show?

What are your settings in the Configuration ... Shipping/Packaging ...

What is the Ship From and the Ship To that you are trying to use?

Note: yesterday another user with issues with FedEx Ground needed to make the follow change to the code:
/includes/modules/shipping/fedexground.php

        if ($this->packageType == '01' && $shipping_weight < 1) {
          $this->_setWeight(1);
        } else {
//          $this->_setWeight(round($_SESSION['cart']->show_weight(),9));
          $this->_setWeight($shipping_weight);
        }

fedex 2.4 is the module.... the weight seems to do nothing, it happens with any weight...the settings are as they a\have been for a year, i have not tuched it... i am not installing a new module, this is the module i have been using for ever.

I am at a loss here... I was on the phone with fedex and they say the they are replying to the query just that my script is not understanding it, they say they are in the process of changing their system

Just got off the phone with Fedex..... seems that they are changing their system over from API to something called Web Sevices... This is the reason for the error... the information being sent back to Zencart is different than it was before...They said that you can abtain the new information requested by contacting fedex.com/developers or something like that.....