I have been reading a book on ASP.NET in preparation for work, but today I learned of my companys fear of migrating to .NET. They are worried that installing the .NET framework on the web server machine could pose potential backwards incompatibility with what we currently have. In other words, the company hesitates to upgrade to .NET because they think our current ASP pages might stop working. Therefore, I am in search of stories of companies experience migrating from ASP to ASP.NET. Did anyone experience backwards incompability? Is it a legitimate concern? Any input would be appreciated.