I got an old enough version of curl.exe and the libraries to run it. Now I get a new error message: "No data returned from Fedex, perhaps the site is down". I turned debug mode on and got this:
"Data sent to Fedex for Rating: 0,"25"10,"122351823"498,"9226247"8,"MA"9,"02155"117,"US"17,"02180"16,"MA"50,"US"75,"LBS"1116,"I"1401,"2.0"1529,"1"1415,"5.95"68,"USD"440,"Y"1273,"01"1333,"1"99,""
Data returned from Fedex for Rating:"
Could this still be related to curl not working?