مشکل با ارور های مکرر nttac و حجم زیاد فایل لاگ آن

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سلام دوستان
یدونه VPS گرفتم روش nttac رو نصب کردم کانفیگ کردن و کار هم میکنه
اما نمیدونم برای چی توی فایل log ، پشت سر هم این ارور میاد

#13-08-2012 10:10:59# NTTacPlus® 2.02 - TACACS+/RADIUS server for Windows - by Alberto Pastore
#13-08-2012 10:10:59# Copyright © 1998-2000 Master Soft S.n.c. - Novara (Italy)
#13-08-2012 10:10:59# Build number: 6  Build date: 24-feb-2000
#13-08-2012 10:10:59# Listening to TACACS+ requests on port 49
#13-08-2012 10:10:59# Listening RADIUS authentication on port 1812
#13-08-2012 10:10:59# Listening RADIUS accounting on port 1813
#13-08-2012 10:10:59# Starting SQL ODBC environment...
#13-08-2012 10:10:59# Starting SQL Accounting...
#13-08-2012 10:10:59# Starting SQL UserDB...
#13-08-2012 10:10:59 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:10:59 ERROR# ODBC: Cannot connect to datasource 'accounting'; ODBC features temporarily disabled, retrying...
#13-08-2012 10:10:59# Registered version (registration name: <administrator>)
#13-08-2012 10:10:59 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:10:59 ERROR# ODBC: Cannot connect to UserDB datasource 'NTTacDB'; user database is not accessible, retrying...
#13-08-2012 10:11:00 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:11:00 ERROR# ODBC: Cannot connect to datasource 'accounting'; ODBC features temporarily disabled, retrying...
#13-08-2012 10:11:00 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:11:00 ERROR# ODBC: Cannot connect to UserDB datasource 'NTTacDB'; user database is not accessible, retrying...
#13-08-2012 10:11:01 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:11:01 ERROR# ODBC: Cannot connect to datasource 'accounting'; ODBC features temporarily disabled, retrying...
#13-08-2012 10:11:01 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:11:01 ERROR# ODBC: Cannot connect to UserDB datasource 'NTTacDB'; user database is not accessible, retrying...
#13-08-2012 10:11:02 ERROR# ODBC SQLError() report: [-1], [IM006], [0],  [[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed]
#13-08-2012 10:11:02 ERROR# ODBC: Cannot connect to datasource  'accounting'; ODBC features temporarily disabled, retrying...

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