Have you scanned with the device tester and verified that SNMP returns information?

Go to Scanning >> Scanning Credentials and add an SNMP credential that you can then map (Credential Mapping) to the specific devices you are attempting to scan w/ SNMP.

Lansweeper is designed to use data from the most extensive protocol open. If both SNMP and HTTP are open on a network device, it should automatically use SNMP since it provides much more data.

it's best you do as Jocob suggested and check whether SNMP actually returns data.

Yeah, I have access points that didn't have the SNMP template applied correctly, they will be lighthttp or whatever you mentioned - so what I did was selected all of them in the assets page, did a mass edit, marked them as access points, until I got the network team to fix their SNMP for them. Then I rescanned them and they updated accordingly.

The way I figured that out, is on the page for the asset, I click the action (I get them confused - there are two actions - test connection and device tester I think - which I personally think they need to rename)... and then I put in the SNMP string and test... I got 'SNMP disabled or wrong community'

In my case, I knew that all the devices weren't locked down to only certain subnets or IP addresses to allow SNMP, so I tested from my laptop... however, the best thing to do is to pull up the program from the lansweeper server and test, because that's what's going to be doing the SNMP connections.

Hope that helps

Thanks guys
SNMP is enabled and working for the devices device tester and also tested with 3rd party snmp tester
LS still will not scan via SNMP
:(

Might be best to send an email to support then.

Another way of verifying that SNMP isn't used is by checking whether the asset's page contains an OID. No OID means no SNMP was used.
Anything more than that will require debug options to be enabled to see that scanning procedure steps and where/why it goes wrong.