Prints extra page with line %! %% %% <</Duplex false>>setpagedevice

Hi to the list members!

I have problem with cups printer setup on linux fedora 5. Whenever I try to
print any kind of document  - cups prints on the begining extra page
containing:

%!
%% %%
<</Duplex false>>setpagedevice


and then prints the actual document. How to disable this anoyance?
Can anyone direct me on how to achive this!?

Thanks!
Moreno