rpm stalls forever

[Samsara Zeal <samsarazeal gmail com>]

I am using Fedora Core 2. 
I just upgrade from FC1 to FC2 by using CDs.
And know I found I can not use command "rpm"
whenever I use rpm, it stalls forever.
even I use "rpm --verbose",  it still no any output given.
I have no idea about this.
Is there any solution for this?

Thanks.