Hi,
When the page do the postback , the table will be reseted.
If you want to keep the queue , there's two solution :
1. in the OnPostBack event , cancel it. but you will not get the FileUploaded event
2. process the OnQueueUI event , and draw the table by your self.
If you are not use AJAX , I think the UploadAttachments control is the best solution for you .
Otherwise you need write some javascript code for it.
Regards,
Terry