SSL Timeout - Client receives "secure connection failed" - Reason: backend DB answer takes too long?

Hello Folks, hope you can help me out here. From time to time some of our clients (connecting via SSL to a VS) receive an secure connection failed error from the webbrowser. It's a simple web application.

The administrator told me that sometimes a database answer takes about 10 seconds because of.. crappy db or whatever.

It always happens when a db request /answer takes this long. So i guess this is the root of the problem. Is this a default behaviour that the ssl connection fails or that the browser interpret this like a failure, when no datas flowing for about 10 seconds?

I nearly checked every timer in the SSL and TCP profile but without success..

Any ideas?