Work sharing only works on one computer

[JHKdezine]

I created two user files: User A and User B. However, when try to open User B file on another computer (computer B) it says the file contains an incorrect schema...I thought to try to create the user B file from computer B from the central file but computer B does not recognize it as a central file. 

I know I was able to do this before but for some reason I cant this time. Help

Also,  I am using dropbox.  I thought maybe this was a path issue so I made sure that the path was the same on both computers.  But is still does not work.

[Alfredo_Medina]

Local files must be created from different computers. It sounds as if you created two files from the same computer and then went to the second computer to "open" a "local file" that was not created there.

[JHKdezine]

But the central file is not recognized as a central file.   You mean to tell me I have to recreate the central file on computer B?

[Alfredo_Medina]

A central file is saved in a folder in the network. Local files must be created from each user's computer. Not from the same computer.

[JHKdezine]

But I am unable to create a new local file because the central file is not recognized as a central file.  

I dont know what happened.  I tried all sorts of things like detaching from central and recreating a new central but nothing.