Google Merchant … TXT feed … wrong head?

Hi,

I generated a google products feed as TXT with TAB separator.
As head I got something like

g:id g:title g:link …and so on

Uploads in merchants … google says “error, no id in feed”.
When I change the head in the file manually and just delete all “g:”, I get no errors and google is happy and I am happy.

Should the plugin not doing it by himself? how I can get rid of the “g:” in the head and still update feed automaticly every day?

thank you