Help, I can't run more than 1 thread

[Nino]

Everytime I try to run more than 1 thread of the same bot to speed up task only 1 will work while all others returns an error like..

Run WebBrowserTabManagment Tab popup is not found in instance.

or

Run HtmlElement Error accessing Instance.ActiveTab

It seems even though they are different threads they are trying to access the same tabs causing a error maybe? just guessing..

Any input would be appreciated