access to shares in a workgroup

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This is a question on Vista Business.

 

There is a workgroup with 4 workstations (1, 2, 3, 4) and 4 is sharing

a folder. 1 & 2 can access that drive by simply mapping to the share,

no name/password is required. When you try to get 3 to map, you are

asked to provide credentials.

 

Since the other computers can access the share properly, I would think

the problem is on 3. There is a limit of 10 users on the share, and

since 2 are connecting, I'm (I hate to use this word) assuming the

permissions for the share are correct.

 

I looked at the local security settings on all the workstations, they

all seem to be set the same.

 

Ideas? Pointers to where I'm screwing up?

 

Thanks!

Mike