Neither would be at the top of my list of suspects, well DEFINITELY NOT the config files, because if they were ay fault in any way you'd be having much more serious issues than those you are describing.
Permissions would be more likely (but again, if this were the case I'd be expecting other aspects of the cart (such as adding new products) to exhibit similar problems.
You never did answer my question as to whether the module you are using is the same one as the link I provided. If it is, then your problem is that this module isn't compatible with your V1.5 installation. No need to look any further.
Cheers
Rod
The entire problem was that I used Ultimate SEO Urls
It really messed my system up. I was told to use the one by Ceon instead.
Glad that is done now.
Now its installed I am having another problem.
My Server company says it takes to much CPU usage.
So the server kills it and I cant get my file generated.
Any Suggestions?