Problem in virtuemart checkout !

hello, I use Joomla 1.0.15 and Virtuemart 1.1.3 whit SEF Advance.
everything works fine, but in the last step of purchase receive the error:

This page does not redirects them properly

the original URL is:
the SEF URL is: /shop/checkout

how can I fix this?

there is a way to not rewrite only the url for checkout ?

thanks for the support and good work !

Try turning off "Redirect non-sef URLs to SEF" in SEF Advance configuration.

Many thanks 
All work hours

BR