In SAP 9.2  PL09 Most of the time we login SAP through browser access but its closed due to session timeout 
Do changes in server file for timeout session.
 
path:>C:Program Files (x86)SAPSAP Business One BAS GateKeeper omcatconf
 

In the server, text file made changes in both place Connection timeout in Sec.

 

Hope your issue resolved.

Regards,
Tejas P