GetListItems /_vti_bin/Lists.asmx

I need to get a item by a giver url. (SP2010)

I am using the Lists.asmx web services. (I can not run code on sharepoint machine).

I tried this:

SPWSList.Lists queryListService = new SPWSList.Lists();
queryListService.Credentials = System.Net.CredentialCache.DefaultCredentials;
queryListService.Url = "http://myServer/_vti_bin/Lists.asmx";

System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
System.Xml.XmlElement query = xmlDoc.CreateElement("Query");
query.InnerXml = "<Where><Contains><FieldRef Name=\"FileRef\"/><Value Type=\"Url\">"
+ "sites/mysite/file.docx</Value></Contains></Where>";

System.Xml.XmlElement viewFields = xmlDoc.CreateElement("ViewFields");
viewFields.InnerXml = "<FieldRef Name=\"ID\" />";

System.Xml.XmlElement queryOptions = xmlDoc.CreateElement("QueryOptions");
queryOptions.InnerText = "";

System.Xml.XmlNode nodeListItems = queryListService.GetListItems(string.Empty, string.Empty, query, viewFields, "10", queryOptions,null);

And I am getting the error:

System.Web.Services.Protocols.SoapException

I just have the url of the item (not the list id, view id and web id)