session timeout

[nnmmss]

any client which works with worldclient in the LAN has no problem but when outside the LAN , (Over the internet) the get a problem which the session randomly expires.the only time which i could find for expiration is in the worldclient option in "setup" menu which are
1- session not composing a message..... which i set the value to 400 minutes

2- session composing a message..... which i set the value to 400 minutes
is there any session time should i set and why it happens randomly?


N/A: Thu 2004-12-23 10:48:08: [CHKXPIP] Session created for safa@pars.com from 69.88.7.194.
N/A: Thu 2004-12-23 10:48:08: [CHKXPIP] BegRequest: View=2 View=Main
N/A: Thu 2004-12-23 10:48:08: [CHKXPIP] EndRequest: View=2 View=Main
N/A: Thu 2004-12-23 10:48:11: [CHKXPIP] BegRequest: View=0 Session=CHKXPIP&View=Menu
N/A: Thu 2004-12-23 10:48:11: [CHKXPIP] EndRequest: View=0 Session=CHKXPIP&View=Menu
N/A: Thu 2004-12-23 10:48:11: [CHKXPIP] BegRequest: View=8 Session=CHKXPIP&View=List
N/A: Thu 2004-12-23 10:48:24: [CHKXPIP] EndRequest: View=8 Session=CHKXPIP&View=List
N/A: Thu 2004-12-23 10:49:58: [JNQVACO] BegRequest: View=8 Session=JNQVACO&View=List&NoKeepAlive=Yes
N/A: Thu 2004-12-23 10:49:58: [JNQVACO] EndRequest: View=8 Session=JNQVACO&View=List&NoKeepAlive=Yes
N/A: Thu 2004-12-23 10:50:12: [CHKXPIP] BegRequest: View=9 Session=CHKXPIP&View=Message&Number=461
N/A: Thu 2004-12-23 10:50:12: [CHKXPIP] EndRequest: View=9 Session=CHKXPIP&View=Message&Number=461
N/A: Thu 2004-12-23 10:51:26: [CHKXPIP] BegRequest: View=8 Session=CHKXPIP&View=List
N/A: Thu 2004-12-23 10:51:48: [CHKXPIP] EndRequest: View=8 Session=CHKXPIP&View=List
N/A: Thu 2004-12-23 10:55:44: User safa@pars.com already logged on using session CHKXPIP.
N/A: Thu 2004-12-23 10:55:44: [CHKXPIP] Expiring session CHKXPIP...
N/A: Thu 2004-12-23 10:55:44: [CHKXPIP] Session CHKXPIP expired.
N/A: Thu 2004-12-23 10:55:44: [LXFEADC] Session created for safa@pars.com from 69.88.7.194.
N/A: Thu 2004-12-23 10:55:44: [LXFEADC] BegRequest: View=2 View=Main
N/A: Thu 2004-12-23 10:55:44: [LXFEADC] EndRequest: View=2 View=Main
N/A: Thu 2004-12-23 10:55:56: [LXFEADC] BegRequest: View=0 Session=LXFEADC&View=Menu
N/A: Thu 2004-12-23 10:55:56: [LXFEADC] EndRequest: View=0 Session=LXFEADC&View=Menu


and other question is that i cannot understand why this lines are logged

N/A: Thu 2004-12-23 10:55:44: User safa@pars.com already logged on using session CHKXPIP.
N/A: Thu 2004-12-23 10:55:44: [CHKXPIP] Expiring session CHKXPIP...
N/A: Thu 2004-12-23 10:55:44: [CHKXPIP] Session CHKXPIP expired.
N/A: Thu 2004-12-23 10:55:44: [LXFEADC] Session created for safa@pars.com from 69.88.7.194.

any help is appreciated
Than kyou