Active Alerts.Filtered - SQL syntax help

Hello,

I'm trying to use the Active Alerts.Filtered resource to show specific alerts. Unfortunately not matter what SQL syntax I use the alerts are always empty. For example alert name is "Device has gone down".

In the SQL filter for the resource i use AlertName='Device has gone down' but this doesn't return any results. This happens for any alerts I try and filter.

I'm guessing my issue is with the SQL filter.

any help appreciated.

Thanks

Paul