WDLive Can't see 1 of my 3 Network shares

I’ve read all the treads about shares issues but can’t seem to find a solution to my problem. I’m running win7 on a Workgroup network and WDLive can see all of my shares on my PC except 1. Strange as it is set up the same as they other 2 but for some reason it won’t even come up in the shares of the WD live. It’s an external hard drive like the other 2 and set up the same as the other 2. I can see it perfectly on all the other computers all but the WDLive. Can someone give me any reason why this would happen??. Tx

Can other network devices see that hard drive? Some USB drives won’t take network permissions properly.