First do some basic validation like

• 1.Your cd license is valid. 2.Check if your website app pool has write permission to website's physical path.

If these are ok , then update your /bin/lib with one you got from your installation

First do some basic validation like

1. Your cd license is valid.

2. Check if your website app pool has write permission to website's physical path.

If these are ok , then update your /bin/lib with one you got from your installation