Vlad is right. This is not a QV issue. I worked in a shop where we did this all the time.
Just thought of something. Is the QV client licensed with a Local license or is it leasing a license from a server? It might be an issue if 2 users are trying to use the same licensed client.
Also, is there an error message associated with the failure to open the QV Client? It would be helpful to have that.