Unable to Access Backroom Reports

[arthur49]

We have ShopSite® Pro 10 r7.1, and are unable to display reports.

Depressing the "Reports" tab produces the following error message:
"Unable to lock reports files. This could be because another process has them locked, or there are file permission problems. Wait five seconds, then try again. If you still see this problem, check the file permission on the .processingstats file in the ShopSite data directories. "

Unfortunately, our hosting service cannot resolve it.

Thanks for any help,

Arthur