import org.apache.commons.httpclient.*
===

I use a code that imports the following package:

    import org.apache.commons.httpclient.*;

I use eclipse. I went to http://hc.apache.org/downloads.cgi & I downloaded the Jar files, I added them to my project. Still eclipse making an error for this. 

> Exception in thread "main" java.lang.Error: Unresolved compilation
> problems:  	HttpClient cannot be resolved to a type

What is the problem?
