when i build my application i get ,some dll error

while building to web player i get a Extracting referenced dll failed.I am using MySQL database connection in unity i think due to my dll file i am getting error if any guys know please help me to solve this issue …

Error in Unity While build to Web player

The Assembly System.Configuration.Install is referenced by MySQL.Data. But the dll is not allowed to be included or could not be found.

Error building Player Extracting referenced dll failed.

Fully Managed DLLs will work, but if you are trying to include native code or plugins, it will not.

See this response for a more accurate description/full details: http://answers.unity3d.com/questions/473921/unity-webplayer-and-dlls.html

I find the solution to work with database MySQL.I avoided using dll library files and made it work through web services communicating with php/mysql database it make build perfect for web player application