Can't see harddrive from PC but I acess it from MAC - My Book World Edition II

I was using the hard drive (wireless) with PC (never had a problem)

Model: My Book World Edition II (white light) WD20000H2NC

Few months back, I bough a MAC and system worked seamless. I was able to read/write from both MAC and PC.

Recently something happened and now I cannot see / acess  harddrive from my PC but I can see it from MAC

Any troubleshooting ideas

Thanks

Try using WDlink to map the my book on the windows PC, also check if your computer workgroup name was changed.

http://wdc.custhelp.com/app/answers/detail/a_id/8573/session/L3RpbWUvMTM0NjM0OTE2Ni9zaWQvNEhFc0ZfNGw%3D