Stream fStream = File.Open(@"F:\General\CRM.txt", FileMode.Open);

byte[] contents = new byte[fStream.Length];

fStream.Read(contents, 0, (int)fStream.Length);

Lists objLists = new Lists();

objLists.Credentials = new NetworkCredential("satish.gorijala", "password", "devhyd");

objLists.Url = "http://mymoss:8080/_vti_bin/Lists.asmx";

objLists.AddAttachment("satish", "101", "CRM.txt", contents);

"Value does not fall within the expected range."

Actually i have no subsites under the sharepoint site..

  http://devhydmoss:8080/Lists/satish/AllItems.aspx

So, the List "satish" is under main site itself. I am able to add new list or library easily without any exceptions.

But when i need to upload a file the soap exception comes into picture. using Lists.GetListCollection() method i retrived a lists of the sharepoint site. i have seen this list "satish" in mainsite itself.