A couple of days ago, I found I could not use Tortoise CVS to work with CVS repository, after I replacing all "extssh" with "ext" in all Root, it's working.
Today, I found Eclipse is not working with CVS repository, and here is the fix:
Preferences->Team->CVS->Ext connection Method->Choose "Use another connection method type to connect", and select Connection type as "extssh".
