Trying to access Google Adwords Sandbox API

[adnonymous]

I'm trying to access Google Adwords Sandbox API and I cannot, for the
life of me, figure out what's going on.

Here's my code:

            var wsUrl = "https://adwords-sandbox.google.com/api/
adwords/cm/v201008/CampaignService";

            var soapRequest =
                    '<soapenv:Envelope \
                    xmlns:soapenv="http://schemax.xmlsoap.org/soap/
envelope/" \
                    xmlns="https://adwords.google.com/api/adwords/cm/
v200906"> \
                    <soapenv:Header> \
                    <service>adwords</service> \
                    <email>***@gmail.com</email> \
                    <password>***</password> \
                    <developerToken>***@gmail.com++USD</
developerToken> \
                    <useragent>MyApplication</useragent> \
                    </soapenv:Header> \
                    <soapenv:Body> \
                        <getClientAccounts/> \
                    </soapenv:Body> \
                    </soapenv:Envelope>';

            $.ajax({
                type: "GET",
                url: wsUrl,
                contentType: document.body,
                crossDomain: true,
                dataType: "jsonp",
                data: soapRequest,
                success: processSuccess,
                error: processError
            });

        });

        function processSuccess(data, status, req) {
            if (status == "success")
                console.log("success");
        }

        function processError(data, status, req) {
            console.log("status = " + status + " data= " + data );
        }


I keep getting 500 Internal Server errors. What am I doing wrong?! On
the Google Adwords Sandbox website, they list simple instructions:

> To create a sandbox account, send a get request to the sandbox version
> of CampaignService, using the WSDL location and sandbox headers as
> described below. This initial call to the sandbox creates an MCC
> sandbox account, along with five client accounts, for the email
> address you specified. Your sandbox account and its client accounts
> start out empty.
http://code.google.com/apis/adwords/docs/sandbox.html

Help!

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