How to upload multiple file with asp.net and jQuery?

Hi,
I want to upload multiple file with asp.net and jQuery. I don't want to use from Uploadify jquery plugin or ... .
I want make my own Plugin or thing for upload multiple files. Thing that I want:
1- Upload with jQuery ajax.
2- That have jQuery progress bar for show uploading bytes, upload status (uploading, completed , ...) .
3- User can add another upload control with JavaScript and start another Upload.
I can add upload control with java script and get upload Status by jQuery ajax.
I have problem when add another upload control and start the new upload occured error and problem with previous upload.
I get the upload list and bind thats to Generic List but when user add another upload control occured error List manipulated.
if don't understand my question and problem tell me I make sample project to see what I want.
But generally I want to make Upload System like linux cPanel file uploading.
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