Access file using pre-signed url

I am adding an object to a bucket in Amazon S3. The addition is successful, now I want to make the file accessible to others by the pre-signed url.

The pre-signed url is of the form: http://ift.tt/1FfYJHl key>&Expires=1432722343&Signature=mmfv%2Fddhhakla1csUrb%2FtRCXYu8%3D

But when I try to load the url, it return with an error:

    <Error>
<Code>SignatureDoesNotMatch</Code>
<Message>
         The request signature we calculated does not match the signature you provided. Check your key and signing method.
</Message>
<AWSAccessKeyId></AWSAccessKeyId>
<StringToSign>
      GET 1432727995 /<bucket>/<key>
</StringToSign>
<SignatureProvided>mmfv/ddhhakla1csUrb/tRCXYu8=</SignatureProvided>
<StringToSignBytes>
     47 45 54 0a 0a 0a 31 34 33 32 37 32 37 39 39 35 0a 2f 72 69 2d 73 65 72 76 69 63 65 2d 74 72 61 6b 2d 74 65 73 74 2f 74 65 73 74 53 75 6e 69 74 31 2e 78 6d 6c
</StringToSignBytes>
<RequestId>0E72b9858758353A0D906</RequestId>
<HostId>
    SOME VALUE
</HostId>
</Error>