Cloned sugarCE works, but no login with IE8 possible

[Gilneas]

Hey guys,

I cloned a wkring installation of sugarCE 6.1.5 to have a test environment.
Therefore I cloned my MS SQL database and copied installation dir.

DB and Web server are the same as for the productive environment. Only difference is the database name, the database user and the url. I did adapt these differences in config.php. And here we go, the clone works fine in FF4 and Opera.

But with IE8 I'm not able to login. There's no error message in the browser and no log output I would say this is an related error. But IE just reloads the login page.

Someone out there with any good idea about that login issue?

Btw. the login works in productive system also in IE8..