Originally Posted by
LizR 
I believe the issue must be how you are assigning your forms to the worker threads (as hinted above).
However, you may need to take into account that your "form2" is not being reset each time, so, when it is reshown, it was at the end of whatever it was doing - this can have bearing as your logic may not have allowed for that.
Well instance of Form2 is being made in Background worker class as public static.Each background worker has his own class.ALL the data is beeing sent to the Form2 class via get,set properties also the instance of Form2 is beeing sent to the Form2 class via get,set.
Everything in the Form2 class all variables are private.
So each background worker has his own instance of form2 and is updating it with data.In Form2 class is beeing called an event when the data is collected and instance is then beeing updated.Well the problem is that i can open one instance and close it as many times as i won't,but when i open one of them and close it and when i try to open ANOTHER one (not the same instance all the time) then everything stops.It looks like when i open first instance that somehow i make it Active or primare and when i close it and try to open another one it won't let me.