ASP.NET 2.0 app Very Fast on 1st app server, very very slow on 2nd app server

We thought our ASP.NET 1.1 app was too slow, so we

a) moved all reports onto a seperate database

b) we upgraded SQL serve开发者_运维问答r 2005 to a brand new machine and SQL 2008 R2

and it ran faster.

Now we changed ASP.NET 1.1 to 2.0 and the app died.

We do a load balancing and 1 server (server B) is always very fast.

Unfortunately, 1 server is not enough - and the 2nd server is painfully slow. So we tried another brand new server in its place - same thing.

To sum up - our database is fast, 1 app server is fast and 2nd app server is always painfully slow.

I have checked the previous questions, none of them seem to apply here. I've googled it & cannot find anything useful.

Anybody got any ideas what are we doing wrong?