UPS shipment API results empty response

[IlyasMuhammed]

Hi,
I am having an issue with ShipAccept service response.

What steps will reproduce the problem?

1. buildRequestXML()
2. responseArray()
3. upsShip (class of ups-php)

What is the expected output? What do you see instead?
the result was blank array

What version of the product are you using? On what operating system?
UPS-PHP-v0.2

Please provide any additional information below.
I'm implementing UPS shipment in codeignitor.

What is the problem?
service call return an empty response.

<?xml version="1.0"?>
<AccessRequest xml:lang="en-US">
	<AccessLicenseNumber>..........</AccessLicenseNumber>
	<UserId>......</UserId>
	<Password>.........</Password>
</AccessRequest> 
<?xml version="1.0" encoding="utf-8"?>
<ShipmentConfirmRequest>
  <Request>
    <TransactionReference>
      <CustomerContext>ups-php</CustomerContext>
      <XpciVersion>1.0001</XpciVersion>
    </TransactionReference>
    <RequestAction>ShipConfirm</RequestAction>
    <RequestOption>nonvalidate</RequestOption>
  </Request>
  <Shipment>
    <Shipper>
      <Name>Joes Garage</Name>
      <AttentionName>Mark Sanborn</AttentionName>
      <ShipperNumber>0792Y7</ShipperNumber>
      <Address>
        <AddressLine1>10000 Preston Rd</AddressLine1>
        <City>Whitehall</City>
        <StateProvinceCode>MT</StateProvinceCode>
        <PostalCode>59759</PostalCode>
      </Address>
    </Shipper>
    <ShipTo>
      <CompanyName>Pep Boys</CompanyName>
      <AttentionName>Manny</AttentionName>
      <PhoneNumber>
        <StructuredPhoneNumber>
          <PhoneDialPlanNumber>410</PhoneDialPlanNumber>
          <PhoneLineNumber>5551212</PhoneLineNumber>
          <PhoneExtension>1234</PhoneExtension>
        </StructuredPhoneNumber>
      </PhoneNumber>
      <Address>
        <AddressLine1>201 York Rd</AddressLine1>
        <City>Timonium</City>
        <StateProvinceCode>MD</StateProvinceCode>
        <CountryCode>US</CountryCode>
        <PostalCode>21093</PostalCode>
        <ResidentialAddress></ResidentialAddress>
      </Address>
    </ShipTo>
    <Service>
      <Code>03</Code>
      <Description>UPS Ground</Description>
    </Service>
    <PaymentInformation>
      <Prepaid>
        <BillShipper>
          <CreditCard>
            <Type>06</Type>
            <Number>4111111111111111</Number>
            <ExpirationDate>011909</ExpirationDate>
          </CreditCard>
        </BillShipper>
      </Prepaid>
    </PaymentInformation>
    <ShipmentServiceOptions>
      <OnCallAir>
        <PickupDetails>
          <PickupDate>20090115</PickupDate>
          <EarliestTimeReady>0945</EarliestTimeReady>
          <LatestTimeReady>1445</LatestTimeReady>
          <ContactInfo>
            <Name>JaneSmith</Name>
            <PhoneNumber>9725551234</PhoneNumber>
          </ContactInfo>
        </PickupDetails>
      </OnCallAir>
    </ShipmentServiceOptions>
    <Package>
      <PackagingType>
        <Code>02</Code>
      </PackagingType>
      <Dimensions>
        <UnitOfMeasurement>
          <Code>IN</Code>
        </UnitOfMeasurement>
        <Length>22</Length>
        <Width>20</Width>
        <Height>18</Height>
      </Dimensions>
      <PackageWeight>
        <Weight>14.1</Weight>
      </PackageWeight>
      <ReferenceNumber>
        <Code>02</Code>
        <Value>1234567</Value>
      </ReferenceNumber>
      <PackageServiceOptions>
        <InsuredValue>
          <CurrencyCode>USD</CurrencyCode>
          <MonetaryValue>149.99</MonetaryValue>
        </InsuredValue>
      </PackageServiceOptions>
    </Package>
  </Shipment>
  <LabelSpecification>
    <LabelPrintMethod>
      <Code>GIF</Code>
    </LabelPrintMethod>
    <HTTPUserAgent>Mozilla/4.5</HTTPUserAgent>
    <LabelImageFormat>
      <Code>GIF</Code>
    </LabelImageFormat>
  </LabelSpecification>
</ShipmentConfirmRequest>