Amazon Autoscaling ~ Issue uploading payload?

We tried to upload a payload.zip for the autoscaled load balanced system, with the startup-parameters for our Application Server (using the commands given below). There seems to be some issue for the current Amazon Autoscaling API, that prevents us from uploading the user-data-file. We have reported the issue in the AWS forum, and awaiting their reply. :)

Creating a launch config
pradeeban@pradeeban:~/pem$ as-create-launch-config autoscalelcapp --image-id ami-xxxxxxxx --instance-type m1.large --user-data-file /tmp/payload.zip --key "keypair" --group "default" -K KEY.pem -C CERT.pem

Updating Auto Scaling Group
pradeeban@pradeeban:~/pem$ as-update-auto-scaling-group autoscleasg1 --availability-zones us-east-1c --launch-configuration autoscalelcas --min-size 1 --max-size 5 -K KEY.pem -C CERT.pem

However we found that, it works when the payload is sent as a string using the param --user-data, instead of --user-data, so we used that to get appserver running, load balanced and auto scaled.

Launch Config
pradeeban@pradeeban:~/pem$ as-create-launch-config autoscalelcas2 --image-id ami-xxxxxxxx --instance-type m1.large --user-data  "AWS_ACCESS_KEY_ID=xxxxxxxxxxxxxxxx,AWS_SECRET_ACCESS_KEY=xxxxxxxxxxx,AMI_ID=ami-xxxxxxxx,ELASTIC_IP=xx.xx.xxx.xxx,PRODUCT_MODIFICATIONS_PATH_S3=s3://wso2-stratos-conf-1.0.0/appserver/,COMMON_MODIFICATIONS_PATH_S3=s3://wso2-stratos-conf-1.0.0/stratos/,PRODUCT_PATH_S3=s3://wso2-stratos-products-1.0.0,PRODUCT_NAME=wso2stratos-as-1.0.0,SERVER_NAME=appserver.cloud.wso2.com,HTTP_PORT=9763,HTTPS_PORT=9443,STARTUP_DELAY=0" -K KEY.pem -C CERT.pem 
OK-Created launch config

Since this works, we are happy to proceed passing the payload as a string, instead of sending it as a zip file. Relevant products will be taken from the S3 buckets and run using the script, hence producing the autoscaled appserver instances.