asp.net设置影响经典asp (IIS 6设置)

My company has some classic asp sites and developing new sites in asp.net, and everytime we create a new site in IIS 6 all the sites go down for a couple of seconds. So I'm thinking of changing the default value of the ASP.NET version to 2.x since that is what we're developing and I'm wondinger if these settings somehow affect the classic asp sites that are running on same IIS.My company has some classic asp sites and devel