Failed to download file (from https:// site )by using SharePoint 2010 web service - COPY

Hi,

I am using the following code to download a file from a different sharepoint2010 site. It is working fine in our local machine. In Customer machine Instead of specified file from document library, it is downloading Page-source file (). The difference is customer site-url start with https://.

Is there any limitation in copy service for https:// ?

Or any other reason can any one explain me?

Part of the code is given below..

DownloadSharePointDocument.Copy copyService = new DownloadSharePointDocument.Copy();
 copyService.Url = DownLoadWP.siteUrl + "_vti_bin/copy.asmx";
 copyService.Credentials = new System.Net.NetworkCredential(DownLoadWP.siteuserID, DownLoadWP.sitePassword, DownLoadWP.adDomain);  
 string sourceUrl = FullFilePath;                
DownloadSharePointDocument.FieldInformation fieldInfo = new DownloadSharePointDocument.FieldInformation(); 
 DownloadSharePointDocument.FieldInformation[] fieldInfoArray = { fieldInfo };                
DownloadSharePointDocument.CopyResult cResult1 = new DownloadSharePointDocument.CopyResult();                
DownloadSharePointDocument.CopyResult cResult2 = new DownloadSharePointDocument.CopyResult();                
DownloadSharePointDocument.CopyResult[] cResultArray = { cResult1, cResult2 };                
byte[] fileContents = new Byte[4096];                
copyService.GetItem(sourceUrl, out fieldInfoArray, out fileContents);                
byte[] obj = fileContents;
//......
//.....

S H A J A N