You can enable more logging by going to the Web.config file and uncommenting out the section on trace listeners:

   <listeners>
    <!--
    <add name="eventLogListener"
      type="System.Diagnostics.EventLogTraceListener"
      initializeData="SpiraTest"/>
    <add name="fileListener"
      type="System.Diagnostics.TextWriterTraceListener"
      initializeData="C:\Program Files\SpiraTest\SpiraTest_Trace.log"/>
   -->
   </listeners>


You need to uncomment the previous section and specify a real file location that you want the trace log file written to. Then you can change the logging levels themselves by changing:

<add name="generalSwitch" value="1" />
<add name="queriesSwitch" value="1" />

to

<add name="generalSwitch" value="3" />
<add name="queriesSwitch" value="3" />