I managed to attach the Custom Events to my website and I have the following errors

Namespace or type specified in the Imports 'System.Web.Management' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.    

It also tell me that httpcontext webbasecodec and webbaseevent are not defined.

And could not load type 'MB.urbanEntertainment.WebCustomEvent' from assembly 'MB.urbanEntertainment.CustomEvents'.    

How do I resolves these problems to get customevents working