Enabling a rule for the application pool in Debug Diag Tool stops my app from serving

Hi

I enabled a rule for  the application pool in  Debug Diag Tool, but it stops my app from serving to users. Here I how I config the rule :

1. Open DebugDiag and click Add Rule.
2. "Crash" should already be selected. Click Next.
3. Choose "A specific IIS web application pool" and click Next.
4. Select the application pool and click Next.
5. You should be on the Advanced Configuration Window. Click Exceptions under Advanced Settings.
6. Click Add Exception and choose Stack Overflow, with an Action Type of Full Userdump
7. Click OK and save and close out.

Is there a problem in configuring the rule ?