Database trace listener in web.config

I am using below listener's to log data. However for Database Trace Listener as of now it is configured to log data for a single database(DB1) but i need to log trace for another database(DB2) also.I have no idea how it can be done, tried googling but couldnt find excat one.

<pre lang="text"><pre><listeners>
<add name="Database Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.Database.FormattedDatabaseTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Database.Configuration.FormattedDatabaseTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
databaseInstanceName="DB1" writeLogStoredProcName="WriteLog"
addCategoryStoredProcName="AddCategory" formatter="Text Formatter"
traceOutputOptions="LogicalOperationStack, DateTime, Timestamp, ProcessId, ThreadId, Callstack" />      
</listeners>