SignatureDoesNotMatch

[innocent-anigbo]

Hi guys,
My apology if i am posting this at the wrong place.
I am trying to move content from IIS to s3 bucket. I have already setup Nginx to proxy-pass to S3 bucket with my AWS Secret Keys and AWS Access Keys. My configuration is as follow:

server {
listen 80;
server_name localhost;

    #charset koi8-r;

    #access_log  logs/host.access.log  main;

           location /customerfolder1 {


            proxy_pass http://mybucketname.s3.amazonaws.com/customerfolder1/;
            aws_access_key **********;
            aws_secret_key **********/***********;
            s3_bucket mybucketname;

            proxy_set_header Authorization $s3_auth_token;
            proxy_set_header x-amz-date $aws_date;
            proxy_intercept_errors on;

 }
    location /customerfolder2 {


            proxy_pass http://mybucketname.s3.amazonaws.com/customerfolder2/;
            aws_access_key *********;
            aws_secret_key **********/*********;
            s3_bucket mybucketname;

            proxy_set_header Authorization $s3_auth_token;
            proxy_set_header x-amz-date $aws_date;
    }

My problem is this:
... each time i try accessing content in s3 from a browser, i usually get the error below:

SignatureDoesNotMatch The request signature we calculated does not match the signature you provided. Check your key and signing method..............

However, when i take out the trailing slash and the 'CustomerFolder' , i don't get this error.

i.e if it is; proxy_pass http://mybucketname.s3.amazonaws.com;

Please some one help me. I have been trying for mouths to figure out what the problem was without any breakthrough.