Getting NERR_DfsNoSuchVolume (Error code:2662) while checking DFS share path

I have an exe (C# application) which runs with a service account and tried to get the DSF link for a file share. Share exists and accessible. i have another similar exe running with the same service account and running fine where as my exe is not getting 2662 error. I compared the both the exe and they are similar but existing exe is not getting that 2662 error. What are the things i can check for that exe to check on this 2662 error code.

Input : \\consto.com\myfolder\folder1
Output: \\BZ1GHT12NM\myfolder\folder1

int Error = NetDfsGetClientInfo(DFSPath, null, null, 3, out Buffer); Error code : 2662 NERR_DfsNoSuchVolume There is no volume whose entry path matches the input entry path. 2662

#region Import

    [DllImport("Netapi32.dll", EntryPoint = "NetApiBufferFree")]
    public static extern uint NetApiBufferFree(IntPtr Buffer);

    [DllImport("Netapi32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
    public static extern int NetDfsGetInfo(
        [MarshalAs(UnmanagedType.LPWStr)] string EntryPath,
        [MarshalAs(UnmanagedType.LPWStr)] string ServerName,
        [MarshalAs(UnmanagedType.LPWStr)] string ShareName,
        int Level,
        out IntPtr Buffer);

    [DllImport("Netapi32.dll")]
    public static extern int NetDfsGetClientInfo(
        [MarshalAs(UnmanagedType.LPWStr)] string EntryPath,
        [MarshalAs(UnmanagedType.LPWStr)] string ServerName,
        [MarshalAs(UnmanagedType.LPWStr)] string ShareName,
        int Level,
        out IntPtr Buffer);

    #endregion

    #region Structures

    public struct DFS_INFO_3
    {
        [MarshalAs(UnmanagedType.LPWStr)]
        public string EntryPath;
        [MarshalAs(UnmanagedType.LPWStr)]
        public string Comment;
        public UInt32 State;
        public UInt32 NumberOfStorages;
        public IntPtr Storages;
    }

    public struct DFS_STORAGE_INFO
    {
        public Int32 State;
        [MarshalAs(UnmanagedType.LPWStr)]
        public string ServerName;
        [MarshalAs(UnmanagedType.LPWStr)]
        public string ShareName;
    }

    #endregion

    const int DFS_VOLUME_STATE_OK = 0x00000001;
    const int DFS_VOLUME_STATE_ONLINE = 0x00000004;
    const int DFS_STORAGE_STATE_ONLINE = 0x00000002;
    const int DFS_STORAGE_STATE_ACTIVE = 0x00000004;

    public static String GetSharePath(String DFSPath)
    {
        if (!String.IsNullOrEmpty(DFSPath))
        {
            IntPtr Buffer = IntPtr.Zero;
            try
            {
                Console.WriteLine("User : {0}, Domain= {1}",Environment.UserName, Environment.UserDomainName);
                Console.WriteLine("Path is {0}", DFSPath);
                int Error = NetDfsGetClientInfo(DFSPath, null, null, 3, out Buffer);
                Console.WriteLine("Error code {0}", Error);
                if (Error == 0)
                {
                    DFS_INFO_3 DFSInfo = (DFS_INFO_3)Marshal.PtrToStructure(Buffer, typeof(DFS_INFO_3));
                    if ((DFSInfo.State & DFS_VOLUME_STATE_OK) > 0)
                    {
                        String SubPath = DFSPath.Remove(0, 1 + DFSInfo.EntryPath.Length).TrimStart(new Char[] { '\\' });
                        for (int i = 0; i < DFSInfo.NumberOfStorages; i++)
                        {
                            IntPtr Storage = new IntPtr(DFSInfo.Storages.ToInt64() + i * Marshal.SizeOf(typeof(DFS_STORAGE_INFO)));
                            DFS_STORAGE_INFO StorageInfo = (DFS_STORAGE_INFO)Marshal.PtrToStructure(Storage, typeof(DFS_STORAGE_INFO));
                            if ((StorageInfo.State & DFS_STORAGE_STATE_ACTIVE) > 0)
                            {
                                if (String.IsNullOrEmpty(SubPath))
                                {
                                    return String.Format(@"\\{0}\{1}", StorageInfo.ServerName, StorageInfo.ShareName);
                                }
                                else
                                {
                                    return (String.Format(@"\\{0}\{1}\{2}", StorageInfo.ServerName, StorageInfo.ShareName, SubPath));
                                }
                            }
                        }
                    }
                }
                else if (Error == 2662)
                    return DFSPath;
            }
            finally
            {
                NetApiBufferFree(Buffer);
            }
        }
        return null;
    }

    public static String GetShareName(String SharePath)
    {
        if (!String.IsNullOrEmpty(SharePath))
        {
            String[] Tokens = SharePath.Trim(new Char[] { '\\' }).Split(new Char[] { '\\' }, StringSplitOptions.RemoveEmptyEntries);
            if (2 <= Tokens.Length)
                return Tokens[1];
        }
        return null;
    }