Hi,
I have no idea how I was fixed this issue.But when I read other post.I think I parameterized userId and I handled this issue.
First of all you must defining how your web site authentication is runing.Then you must choose a available auth mode on testcomplete then you need paramaterized web request.
Another issue is how is ur web site is running for add an item to chart.If you are running website based on userId you need parameterized other request for dynamic userId.For add item to different userId.You need first of all know how is your website is running.Than you need create case about your website behavior.
Thanks.