Snmp configuration for SG300

Hi,
Am trying to configure SNMP functionality for the first time on an SG300-28 switch so I can use mrtg to monitor it. I've defined no users, 2 groups (mrtg and mrtg2 for SNMPv1 and SNMPv2 respectively), both with No authentication required. Default View of Read. I also defined a Basic Community type and called it sg300, with the View Name of Default. Under Views I changed nothing; the Default has 1 Object ID subtree included.
The mrtg CFGMaker in cannot retrieve any information from the switch. I've used it before with routers, Windows servers, etc. with no problem so I have to be overlooking something specific to this switch.
Much appreciated.
--Ben

Agreed Jonathan was correct, that was the part I missed the first time through. I walked through again to make sure there wasn't anything else and have attached the notes I took, mostly so I'll have them next time I have to do it :)
Steps to configure SNMP for MRTG on SG200-26
***Note*** These are minimum steps only for a lab environment additional security settings may be required for production use.
Switch is starting at factory reset configuration state
Login to the switch
Default ip 192.168.1.254
Username: cisco
Password: cisco
Change Password
Expand SNMP Section on bottom of left navigation
Highlight communities on the expanded SNMP section
Click the Add button
Enter the IP address of the system that will be making SNMP requests to your switch
Community string: mrtg (or whatever you want to use)
Ensure Read Only is selected for your access mode
Click Apply
Click Close
Expand the Security Section on the left navigation bar
Highlight TCP/UDP Services
Click the Checkbox to enable SNMP Service at the top of the screen
Click Apply
In the top right hand corner you should see a flashing save button, make sure to save your config if your happy with it.
“Snmpwalk –c mrtg 192.168.1.254” Should now run and return
***Note*** If your looking for port numbers in the output they start with .49 for port 1 and go to .74 for port 26.
IF-MIB::ifHCOutOctets.49 = Counter64: 0
IF-MIB::ifHCOutOctets.50 = Counter64: 0
IF-MIB::ifHCOutOctets.51 = Counter64: 0
IF-MIB::ifHCOutOctets.52 = Counter64: 0
IF-MIB::ifHCOutOctets.53 = Counter64: 0
IF-MIB::ifHCOutOctets.54 = Counter64: 0
IF-MIB::ifHCOutOctets.55 = Counter64: 0
IF-MIB::ifHCOutOctets.56 = Counter64: 0
IF-MIB::ifHCOutOctets.57 = Counter64: 0
IF-MIB::ifHCOutOctets.58 = Counter64: 0
IF-MIB::ifHCOutOctets.59 = Counter64: 2849723
IF-MIB::ifHCOutOctets.60 = Counter64: 0
IF-MIB::ifHCOutOctets.61 = Counter64: 0
IF-MIB::ifHCOutOctets.62 = Counter64: 0
IF-MIB::ifHCOutOctets.63 = Counter64: 0
IF-MIB::ifHCOutOctets.64 = Counter64: 0
IF-MIB::ifHCOutOctets.65 = Counter64: 0
IF-MIB::ifHCOutOctets.66 = Counter64: 0
IF-MIB::ifHCOutOctets.67 = Counter64: 0
IF-MIB::ifHCOutOctets.68 = Counter64: 0
IF-MIB::ifHCOutOctets.69 = Counter64: 0
IF-MIB::ifHCOutOctets.70 = Counter64: 0
IF-MIB::ifHCOutOctets.71 = Counter64: 0
IF-MIB::ifHCOutOctets.72 = Counter64: 0
IF-MIB::ifHCOutOctets.73 = Counter64: 0
IF-MIB::ifHCOutOctets.74 = Counter64: 0

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