Hi, ritagoncalves
It seems that while debugging, I discovered that there were some issues with the module "gk5 news show pro" and some functions in the Virtuemart core were also causing errors. However, I was able to find solutions for these issues and fixed them. To do this, I updated some of the files directly (and renamed some of the old files as "file-old.php").
I have attached a zip file for you. Also there are still some issues with the Virtuemart core that are related to language translation. I suggest that you contact the Virtuemart team to get further assistance with these issues.
Please test further and let us know!
Regard,