serialised and deserialised

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WCFServices

I have hosted wcf service on remote server. I can able to get single value or single record from wcf service. But if there is multiple records is there then is gives problem.
After retrieving data in dataset from DB in wcf, I have 1st serialised it and then this serialised data is tranfer to my web app. But if there is mutiple column in datatable then then wcf dose not return any value. As this wcf is hosted on remote server i cant able to debbug it.
I have tested this wcf on iis then its working fine.But issues occured when i host this service on remote server. So any one can plz help me??

My serialization code is as follows...whats wrong with it?? or what may be the problem in my case??

public byte[] DS_Serialize(DataSet ds)
    {
        try
        {
            byte[] binaryDataResult = null;
            using (MemoryStream memStream = new MemoryStream())
            {
                BinaryFormatter brFormatter = new BinaryFormatter();
                ds.RemotingFormat = SerializationFormat.Binary;
                brFormatter.Serialize(memStream, ds);
                binaryDataResult = memStream.ToArray();
            }
            return binaryDataResult;
        }
        catch (Exception er)
        {
            return null;
        }
    }