Error log
 

File: core_mapstyles.xml
System
at System.Net.Sockets.NetworkStream.BeginRead(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
at System.Net.Connection.BeginRead(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
at System.Net.ConnectStream.InternalBeginRead(Int32 bytesToRead, NestedSingleAsyncResult castedAsyncResult, Boolean fromCallback)
at System.Net.ConnectStream.BeginReadWithoutValidation(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
at System.Net.ConnectStream.BeginRead(Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
at System.Net.ConnectStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at WindowsApplication7.DownloadWorker.DownloadFile()Unable to read data from the transport connection.