Action cannot executed in offline workspace in windchill

Hi,

I'm new in windchill thats why I'm exploring it. I created different use, each user have different groups.

Scenrario:

The ADMIN user created a workspace named "CRANKCASE" inside the crankcase there are parts and assembly file.

The CAD CONTRIBUTOR user can see the file in crankcase it also allow checking out in windchill browser but when I try to open it in cre I get error says

"Action cannot executed in offline workspace in windchill" but my workspace is active as a CAD CONTRIBUTOR

Thanks in advance!

Luar