Problem in Health Monitoring in .Net 3.5

 Hi,
I'm using the below code in web.config file
<healthMonitoring enabled="true">
<eventMappings>
<clear/>
<add name="All Errors"
type="System.Web.Management.WebBaseErrorEvent, System.Web,Version=2.0.0.0,Culture=neutral,PublicKeyToken=b03f5f7f11d50a3a"
startEventCode="0"
endEventCode="2147483647"/>
</eventMappings>
<providers>
<clear/>
<add name="EmailErrorProvider"
type="System.Web.Management.SimpleMailWebEventProvider"
to="someone@someone.com"
from="someone@someone.com"
buffer="false"
subjectPrefix="An error has occured."
bodyHeader="This email is generated from my application." />