请求的性能计数器不是一个自定义计数器，它必须被初始化为ReadOnly

在网站的生产环境（Windows Server 2008，IIS 7）中出现此错误。

The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [InvalidOperationException: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly.] System.Diagnostics.PerformanceCounter.InitializeImpl() +1238 System.Diagnostics.PerformanceCounter..ctor(String categoryName, String counterName, String instanceName, Boolean readOnly) +284 Microsoft.EnterpriseInstrumentation.EventSourceCounters..ctor(String eventSourceName, String eventSourceFullName, Boolean isRequestEventSource) +463 Microsoft.EnterpriseInstrumentation.EventSource..ctor(String name, String description, Boolean checkName) +785 Microsoft.EnterpriseInstrumentation.EventSource..cctor() +194 

我怎么解决它？