The "CompressorTask" task was not found. about yuicompressor.net.msbuild HOT 3 OPEN

There was a small mistake. the name in usingtask element had an 's' in the end. I corrected it and this time it gives me below error.

C:\Users\I868962\Documents\repos\WebApp1\yui\compressor.xml(9,5): error MSB4062: The "CompressorTask" task could not be loaded from the assembly C:\Users\I868962\Documents\repos\WebApp1\yui..\bin\Yahoo.Yui.Compressor.MsBuild.dll. Confirm that the declaration is correct, that the assembly and all its dependencies are available,and that the task contains a public class that implements Microsoft.Build.Framework.ITask.

from yuicompressor.net.msbuild.

I even tried msbuild yui\compressor.xml and the result is the same as shown below:

from yuicompressor.net.msbuild.

This time put the compressor.xml in the root and removed the relative path (..) in the xml file. Still its the same result as shown in below screen

from yuicompressor.net.msbuild.