sharing problem in 95 system connected t

i am facing problem for sharing the pc in share lavel
e.g.
i am sitting on “A”‘s computer and giving full access to user “B”. When “B” login to machin his own login and access computer “A”, “B” is not getting access, it showing access denied.
But when i give access to “everyone” or “World” that time “B” can access “A”‘s computer thru his own login.

I am getting access thru share lavel also.

I check all protocol also, but i can’t solve this problem.