Are you getting errors about the “RA layer request failed” and “svn: PROPFIND request failed on ..”, followed by an error about not being able to connect to the SVN server? Well, here is what to do:

• Install the latest Subclipse plugin for Eclipse. Read the manual at Subclipse
• Set the right proxy settings at the Subversive-config-file (usuallylocated at C:\Documents and Settings\MyUserId\Application Data\Subversion\servers). At the bottom of the file you’ll find http-proxy-host and http-proxy-port. Uncomment these lines and set the right values. Save this file and restart your Eclipse environment.

For me it worked perfectly. Hope this will be useful for you too.