your network access was interrupted. to continue close the database and then open it again

Hello community

I am trying to access Ms Access Db on a network folder from Visual web developer website created on HTTP

Here is my connection string

CODE
"Provider=Microsoft.ACE.OLEDB.12.0;" & _
                                      "Data Source=\\ServerName\workgroup\SharedFolder\db.accdb;"


I get the above error when i try to open a connection

CODE
cnn = New OleDbConnection(sconnection)
            cnn.Open()



If i change the connection string to point to a db on say Drive D on the PC, the connection is successful...

Why cant i open the db on the shared Lan folder?

i have given persmission to both Asp.net and iusr_Machine name to the folder but still get the same error.

Any suggestions?

Ronald