Install IBM servers from a distance

At my work, I needed to reinstall a server which is located in a datacenter in Amsterdam and I am located in Rijswijk. But the servers have a managament-interface (RSA 2 of IBM) and the capability to mount a local image to the server :-P

So I tried... using Firefox but it didn't work at all.. It didn't detect the image :-(

After about 1 day a collegue of mine suggested to use MS Internet Explorer... and guess what... It worked :-) So I didn't had to go to Amsterdam ;-)