#1 svg2css error message

[halazzz zzz]

I have tried to use svg2css inkscape extension, but it resulted in no output with this error message: Source file C:\WINDOWS\Temp\ink_ext_XXXXXX.svg9EFDKV not an SVG.
I have attached my svg input file, but I have tried many other simple input files and it resulted in the same output.
I am using win7, inkscape 0.48 and Python 2.7.

[halazzz zzz]

this is my svg input file