problem uploading large file to a webservice .net3.5

Dear Experts,

I have a from that uploads files to data table(in session) and then after clicking on send button it calls a webservice dynamically and uploads the file to data base.

I've set the request length and etc for both application and webservice to 2GB:

<httpRuntime executionTimeout="10000" maxRequestLength="2000000"/>

Every thing works fine until the file size reaches to 100MB

After that, the application returns me an exception:

Exception has been thrown by the target of an invocation.
InnerException: The underlying connection was closed: An unexpected error occurred on a send.

I've a custom exception on my webservice codes so I know it will never enter the codes of webservice.

I should add that the call web service dynamically is a dll that I used.... can anybody help me?

[edit] little typo and format[/edit]
[improve] I should add that the webservice and the Prosentation are on the same server, also I've checked this with UI on my local computer to call that webservice[/improve]
[improve2]I'm using .net 3.5[/improve2]
----------------------------

[improve 3] this is full error text
System.Net.WebException occurred
  Message="The underlying connection was closed: An unexpected error occurred on a send."
  Source="System.Web.Services"
  StackTrace:
       at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
       at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
       at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
       at NHTC.WA.DMS_Maroun.wsprojFileInsert.WSManageDMSProject.InsertFile(DataSet dsInput, String userName) in C:\NHTC_TFS_WorkSpace\OrganizationPortal\UI\DMS_Maroun\NHTC.WA.DMS_Maroun\NHTC.WA.DMS_Maroun\Web References\wsprojFileInsert\Reference.cs:line 2212
       at NHTC.WA.DMS_Maroun.iMultipleuploads_M.insertNewFiles() in C:\NHTC_TFS_WorkSpace\OrganizationPortal\UI\DMS_Maroun\NHTC.WA.DMS_Maroun\NHTC.WA.DMS_Maroun\iMultipleuploads_M.aspx.cs:line 302
  InnerException: System.IO.IOException
       Message="Unable to write data to the transport connection: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full."
       Source="System"
       StackTrace:
            at System.Net.Sockets.NetworkStream.MultipleWrite(BufferOffsetSize[] buffers)
            at System.Net.Connection.Write(ScatterGatherBuffers writeBuffer)
            at System.Net.ConnectStream.ResubmitWrite(ConnectStream oldStream, Boolean suppressWrite)
       InnerException: System.Net.Sockets.SocketException
            Message="An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full"
            Source="System"
            ErrorCode=10055
            NativeErrorCode=10055
            StackTrace:
                 at System.Net.Sockets.Socket.MultipleSend(BufferOffsetSize[] buffers, SocketFlags socketFlags)
                 at System.Net.Sockets.NetworkStream.MultipleWrite(BufferOffsetSize[] buffers)
            InnerException: 
[/improve]

Tags: C#, .NET (.NET 3.5), ASP.NET, File