SCP - Unable to copy more than 4gb file

I have SSH Server (Reflection IT) running on Windows 2008 Server. There are SQL server backups being generated periodically which i want to download on my Linux server.

The backup file size is 6gb. When i try to download using SCP, it downloads only 4GB size and shows 100%. At then end of completion following message displayed

scp protocol error: expected control record.

Please advise what could be the issue.

Thanks Bala