Why do I get 80070070 errors?

You may have come across this error: 
 

<object> error '80070070'   There is not enough space on the disk.

 
This is exactly what it sounds like... one of the disks that your ASP page is (perhaps indirectly) trying to write to is full. It may be the drive the ASP page is running in, or creating a file in (which could be a share on another machine). It may be the drive containing the temp folder(s) or the page file(s). If you are using CDONTS, it could be the SMTP server. 
 
Check the code, and analyze where it might be writing files; then, check those locations for sufficient space.