I am trying to install Kentico version 4.0 on a new hosting provider. (I need to migrate my existing site.) Installation went perfectly and now I am trying to import a site using Kentico's Site Import feature. Kentico starts to unzip the file but fails to complete each time with the following error.

The process cannot access the file guid.wmv.export becase it is being used by another process.

It always happens with the same file so I remove the file from the original site, repackged tje site and tried again. Now I get the same error but with a different file.

Any suggestions? ASP.NET is set to classic application pool. I don't have another other server settings. Running on Discount ASP.NET hosting provider.