Respected Sir, We are using Small Business server 2003 forSharing Drives/Map drive, we have 9 client all have XP operating system in their computer. for internet we are using WIMAX, Service provider wateen. weare using 16 port HUB, DLINK, we are also using exchange server for our local exchange. we are using domain based network. Now the problem that is arising for a month is describe below in complete detailed:- some time whenuser log in to their system they are unable to log as message come you are not on domain, But after three attempt they log on their system. some time when using access the map drive they unable to access the map drive. similarly client system become too slow and even unable to open word/Xls file. their system hangs. after restarting they able to access the map drive but same problem arise again after half an hour. please any body help me, i am very thankful if some body help me. Best Regards Ahsan Saleem