snmpapp.conf is broken and php cant work

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My PHP works under IIS as ISAPI extention.
A few scripts are run under php-cgi.exe
php_snmp.dll is set in php.ini

Sometimes, when a script calls snmp function,
c:\usr\SNMP\PERSIST\snmpapp.conf breaks. After that IIS cannot run
scripts. php-cgi.exe warn me simething like "cannot load module" and
cannot run scripts too. All I can do is deleting snmpapp.conf. Next time
PHP forks fine until new problem with this file.
http://bugs.php.net/bug.php?id=48213

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