IIS: Cannot find module (IP-MIB) - only on external drive

I don’t get these errors on any sites located on C drive but on D drive If a php site is run i get the following:

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)

Php is installed to C:\PHP