We need more information such as your operating system (and version), the version of PG Desktop you installed, etc. A screenshot would be helpful as well (I think I know what you're seeing, but I can't be sure without a screenshot).
Thank our for your reply.
OS: Windows 8.1 64bit.
PhoneGap Desktop version i installed: version 0.4.3.
Node.js : version node-v7.4.0-x64 --due to this version of node.js phonegap was stuck.
Then i installed node-v6.9.4-x64 version and PG started working.
Its Thank you.