asp.net - Getting error with dots in the url -

i have routed page url http://www.example.com/2/2332/example when give period in url http://www.example.com/2/2332/example. taken server error page:

http 404. resource looking (or 1 of dependencies) have been removed, had name changed, or temporarily unavailable. please review following url , make sure spelled correctly.

i redirect same page http://www.example.com/2/2332/example or custom 404 error page http://www.example.com/404.aspx.

i tried debugging not hitting application_error event in global.asax.cs.

any solve issue?

the breakpoint not hit because not asp.net error. iis error. have modify web.config redirect custom error page.