About SharePoint DateTime issue

Riwut Libinuko 

I intercept user login time and put it into the List A, when user logs into the SharePoint. I found the data (Login Time) will be converted to UTC Date Time and saved it into the Database. the Login time on the List View will be Local Time as the shown below. But when I use the same User ID and Login Time to search by CAML language, I cannot found anything. I also list out my source code for you to look at. so do you have any idea on it ?? Thanks

DateTime dateTime = DateTime.UtcNow;

                    if (sPList != null)
                    {
                        SPListItemCollection listItemCollection = sPList.Items;
                        SPListItem sPListItem = listItemCollection.Add();

                        sPListItem["Title"] = "0#.w|litwareinc\\administrator";
                        sPListItem["Login_x0020_Time"] = System.TimeZone.CurrentTimeZone.ToLocalTime(dateTime);
                        sPListItem["UTC"] = dateTime;

                        sPListItem.SystemUpdate();

                        SPQuery sPQuery = new SPQuery();

                        sPQuery.Query = @"<Where><And><Eq><FieldRef Name='Title' />" +
                                        "<Value Type='Text'>0#.w|litwareinc\\administrator</Value></Eq>" +
                                        "<Eq><FieldRef Name='Login_x0020_Time' /><Value IncludeTimeValue='true' Type='DateTime'>" + dateTime + "</Value></Eq>" +
                                        "</And></Where>";
                        //sPQuery.ViewFields = @"<FieldRef Name='Title' /><FieldRef Name='Login_x0020_Time' />";

                        SPListItemCollection sPListItemCollection = sPList.GetItems(sPQuery);