.mpg and .flv files not supported by kdenlive

Hello, I'm using opensuse11, I'm using kdenlive 0.6.0-svn but I can't import neither .mpg nor .flv files. The program tells me: "format not supported" or something similar. I have the same problem using sabayon. This is a new problem because till the last week I could import those files easily inside kdenlive!
Is this problem linked to some new updating of the program? How could I solve the problem?

Thanks a lot!

Antonio