Help!! Unknown Error using Nero 6

[just-got-wicked]

Hi, I'm very new to all this, so bear with me!
I've downloaded various music videos (in WMV format), and I've been trying to burn them onto a VCD using Nero 6. Whenever I try putting more than one music video on, Nero has an unknown error while encoding the files. It always encodes the first file, and then crashes when it starts the second one. Rather annoyingly, if I just put one music video onto a VCD, it always works. I'm hoping this makes some-kinda sense to somebody, as I'm at my witts end!!!

Thanks.

[decryptit]

Try updating it.

[setarip]

How large are the files?