FedEx Rate Request API Expert Needed

We currently have a working FedEx API script, but it only works when the carrier code is set to FDXE We need to be able to get the Ground Rates and set it to FDXG. (It would actually be great if we could get both at the same time, but we will settle for being able to chose. When we do this, we get nothing back from FedEx in the way of rates. We are looking to get this done right away, so we will be monitoring the bids. You must know the FedEx API system, we only want experienced people, thanks. If you cna work with UPS and USPS as well that would be a bonus.