ASP and ASP.NET

Using asp code and asp.net code on the same site

[Skyrider]

I have some older asp web apps and am now getting other web applications developed in asp.net, I will be using all these on the same site, would these function ok on site or should I have all asp apps upgraded and redeveloped in asp.net (my old site had glossarys, form management, graphic preview asp login system, etc, my new site will have an asp.net ecommerce system and I would like to integrate my old apps and systems.
Thanks

[centime]

There will always be issues combining both

For example , its very dificult to maintain session from asp to asp.net, the session variable do not match,

You mention logon, well, it might require some really good footwork to manage users moving between pages using asp and asp.net,

But there are always options