Hi
  I have a very serious problem that is i am developing a web site in ASP 3.0. I have a requirement that i use nice urls to navigate through web pages. I have done this all through using ISAPI filter. That is i get the web request in ISAPI filter and redirect in each case to a web page redirect.asp. On this page i have implemented my logic in a way that i get actual url from database against nice url and use "Server.Transfer" to navigate to that page.

Now the problem i have is that it works fine many times but some times it gives me the error of "Service Unavailable". Infact it do some thing to my IIS that no web site work after that.

I can work further by reseting the IIS then

Kindly if any one can give me the solution to this