Padma,
Hi. Based on your statement "But still facing the issue(Client Not Logged into server) when downloading the orders."
We are also releasing a new SMP 3.0 runtime server SP10 PL01 (This first quarter - January'ish to February'ish) that has a fix tied to sockets not being closed - which affects performance and disconnects. This could affect the disconnects tied to your statement above.
This is in addition to the suggestions above.
Best Regards,
SAP Mobile Support Team