ARR 6.7 builtin workflows - not working

Hi All,

I'm a newbie to ARS - currently inherited a ARS 6.7 environment we need to get working. We've noticed that none of the builtin workflows seem to work.

I've check the startup conditions and the work config itself it all seems ok. It's for the manager approval for group membership changes. Are there any specific log files for workflows I can check. My suspicion is they're just not firing. 

Any help / tips / guides / docs  gratefully received.

Thanks

Tom