Can't connect to remote PC using IP, Only name

I have a remote PC's shared drive I am connecting to. Works fine if I use the PC name in the remote path, but not when I use the IP. Though if I copy and paste the path with the IP address in my explorer it works fine as well.

This is the calling code:

// '\\\\CAS-UP2\\Images'         ---> Works Fine
// '\\\\169.254.199.149\\Images' ---> Doesn't Work
using (new ConnectToSharedFolder(networkPath, credentials))
{
    // We succesfully connected
    haveAccess = true;
}

This is the class code:

public class ConnectToSharedFolder : IDisposable

{
    private readonly string _networkName;

    //---------------------------------------------------------------------------
    /// <summary>
    /// Constructor
    /// </summary>
    public ConnectToSharedFolder(string networkName, NetworkCredential credentials)
    {
        _networkName = networkName;

        var netResource = new NetResource
        {
            Scope = ResourceScope.GlobalNetwork,
            ResourceType = ResourceType.Disk,
            DisplayType = ResourceDisplaytype.Share,
            RemoteName = networkName
        };

        var userName = string.IsNullOrEmpty(credentials.Domain)
            ? credentials.UserName
            : string.Format(@"{0}\{1}", credentials.Domain, credentials.UserName);

        var result = WNetAddConnection2(
            netResource,
            credentials.Password,
            userName,
            0);

        if (result != 0)
        {
            throw new Win32Exception(result, "Error connecting to remote share");
        }
    }

    //---------------------------------------------------------------------------
    /// <summary>
    /// Deconstructor
    /// </summary>
    ~ConnectToSharedFolder()
    {
        Dispose(false);
    }

    //---------------------------------------------------------------------------
    /// <summary>
    /// Dispose Method
    /// </summary>
    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }

    //---------------------------------------------------------------------------
    /// <summary>
    /// Dispose Method
    /// </summary>
    protected virtual void Dispose(bool disposing)
    {
        WNetCancelConnection2(_networkName, 0, true);
    }

    //---------------------------------------------------------------------------
    /// <summary>
    /// WNet add connection method
    /// </summary>

    [DllImport("mpr.dll")]
    private static extern int WNetAddConnection2(NetResource netResource,
        string password, string username, int flags);

    //---------------------------------------------------------------------------
    /// <summary>
    /// WNet cancel connection method
    /// </summary>
    [DllImport("mpr.dll")]
    private static extern int WNetCancelConnection2(string name, int flags,
        bool force);
}