Problem with SSL connection in an ASP.NET web app

[serji]

Hi,

I have developed an ASP.NET web application that is installed in a virtual
directory which is configured with SSL and mutual authentication. The problem
is that, sometimes, while i am using the web app, the browser prompts me a
client SSL authentication popup in order to select the SSL client certificate
again. It is like the SSL session has expired...¿¿??

I think the problem could be the browser configuration, since the problem
only happens when accessing from some PCs.

any help or information will be appreciated.

thanks in advance!