Can I connect two times to an IRC server, once with my wireless connection and one with my Ethernet Card ? (2 different IP's !)

How do I do that ?

You can run multiple instances of mIRC. So while mIRC is on try to open mIRC again, you will see that it does open. But what youre talking about sounds like 2 seperate machines.

Well errr... 2 different machines: 2 different routers...
So with one instance of mIRC i want to connect one time true each router, which have different IP's...

All i can say is to run mIRC in each machine. If theres a way to do what you want, I sure dont know how.

Why dont you just run it in each machine independantly?

Because it's my neighbours wireless router

Once you're connected to the first server, you can probably adjust this setting to cause a new connection to go through the other card.

Alt+O > Connect > Options > Advanced

[x] Bind sockets to IP address: <other card's IP>

I think it's a very good try, but unfortunately:

* Unable to connect to server (No Route to Host)

Edit: I managed to connect a second time, but then the first one died...
Anyone an idea ?

What was the error message?

Anyway, you should be able to start another instance of mIRC, disable binding and connect from there.