Hi Eric,
I removed dates - no luck.
Request and response you asked:
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="
http://schemas.xmlsoap.org/soap/
envelope/" xmlns:ns1="
https://adwords.google.com/api/adwords/info/
v200909" xmlns:ns2="
https://adwords.google.com/api/adwords/cm/v200909"
xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance">
<SOAP-ENV:Header>
<ns1:RequestHeader xsi:type="ns1:RequestHeader">
<ns2:applicationToken>xxxxxxxxxxxxxxxx</
ns2:applicationToken>
<ns2:authToken>xxxxxxxxxxxxxxx</ns2:authToken>
<ns2:developerToken>xxxxxxxxxxxxxxxxx</
ns2:developerToken>
<ns2:userAgent>AdWords API PHP Client LIbrary -
v1.1.0</ns2:userAgent>
</ns1:RequestHeader>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<ns1:get xsi:type="get">
<ns1:selector xsi:type="ns1:InfoSelector">
<ns1:apiUsageType>FREE_USAGE_API_UNITS_PER_MONTH</ns1:apiUsageType>
</ns1:selector>
</ns1:get>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
<soap:Envelope xmlns:soap="
http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<ResponseHeader xmlns:ns2="
https://adwords.google.com/api/
adwords/cm/v200909" xmlns="
https://adwords.google.com/api/adwords/info/
v200909">
<ns2:requestId>a7177f0e64a130dff6ce78a61e3f7923</
ns2:requestId>
<ns2:operations>1</ns2:operations>
<ns2:responseTime>3708</ns2:responseTime>
<ns2:units>1</ns2:units>
</ResponseHeader>
</soap:Header>
<soap:Body>
<soap:Fault>
<faultcode>soap:Server</faultcode>
<faultstring>[EntityNotFound.INVALID_ID @ selector]</
faultstring>
<detail>
<ApiExceptionFault xmlns="https://
adwords.google.com/api/adwords/info/v200909" xmlns:ns2="https://
adwords.google.com/api/adwords/cm/v200909">
<ns2:message>[EntityNotFound.INVALID_ID
@ selector]</ns2:message>
<ns2:ApplicationException.Type>ApiException</
ns2:ApplicationException.Type>
<ns2:errors xmlns:xsi="
http://www.w3.org/
2001/XMLSchema-instance" xsi:type="ns2:EntityNotFound">
<ns2:fieldPath>selector</
ns2:fieldPath>
<ns2:trigger></ns2:trigger>
<ns2:ApiError.Type>EntityNotFound</
ns2:ApiError.Type>
<ns2:reason>INVALID_ID</
ns2:reason>
</ns2:errors>
</ApiExceptionFault>
</detail>
</soap:Fault>
</soap:Body>
</soap:Envelope>