Error when enabling snmpget in PHP

[RobertS]

(I use Plesk 7.6 on w2k3)

Error when I enable the following extention:
extension=php_snmp.dll

After I enabled this extention in the php.ini file and restarted the http services I get on each PHP page the following error at the bottom of the site:

Cannot find module (IP-MIB): At line 0 in (none) Cannot find module (IF-MIB): At line 0 in (none) Cannot find module (TCP-MIB): At line 0 in (none) Cannot find module (UDP-MIB): At line 0 in (none) Cannot find module (SNMPv2-MIB): At line 0 in (none) Cannot find module (SNMPv2-SMI): At line 0 in (none) Cannot find module (UCD-SNMP-MIB): At line 0 in (none) Cannot find module (UCD-DEMO-MIB): At line 0 in (none) Cannot find module (SNMP-TARGET-MIB): At line 0 in (none) Cannot find module (SNMP-VIEW-BASED-ACM-MIB): At line 0 in (none) Cannot find module (SNMP-COMMUNITY-MIB): At line 0 in (none) Cannot find module (UCD-DLMOD-MIB): At line 0 in (none) Cannot find module (SNMP-FRAMEWORK-MIB): At line 0 in (none) Cannot find module (SNMP-MPD-MIB): At line 0 in (none) Cannot find module (SNMP-USER-BASED-SM-MIB): At line 0 in (none) Cannot find module (SNMP-NOTIFICATION-MIB): At line 0 in (none) Cannot find module (SNMPv2-TM): At line 0 in (none)

I checked is there is a mibs folder present with all mib file and it is, also I copied this mib folder to D:\usr\mibs (Plesk is installed on D, the vhosts are on E) which is suggested by www.php.net

Ofcourse I restarted the webservice after each change but still I keep getting this message at the bottom of the site.

What did I do wrong or forget?
Who can help?