Strange Table Locking Error

I have a MDB on our network that stores data from a third party VB app. I
have created another MDB that links into this third party MDB database to
run reports that are not provided by the third party app.

On one workstation, I am getting a message that "table xyz is locked by user
admin on machine CMM1" when I try to access the third party MDB tables
through my MDB.

There IS someone using the third party app, and there is an LDB file
present. However, on another workstation, I do not get this error and I am
able to access the data without any issues regardless if there is another
person in the third party app or not. It seems to be workstation-specific.

What is causing this error, and how do I work around?

Help!

Thanks
Joe