Hi

This is a run through of all the agent install failure possibilities which covers the issue you have:

http://technet.microsoft.com/en-us/library/ff358634.aspx 

http://blogs.technet.com/b/kevinholman/archive/2009/01/27/console-based-agent-deployment-troubleshooting-table.aspx

It is most likely to be a firewall issue.

But also make sure the account that you specify to install the agent with is a local administrator on the target server (Step 7 of the items below):

http://technet.microsoft.com/en-us/library/cc950509.aspx 

If you choose Use selected Management Server Action Account then this needs local admin rights on the target server which usually means you are running this as a domain admin account which isn't good security practice. Better at step 7 to choose Other user account, and specify an account with local admin rights.

Cheers

Graham

Regards Graham New System Center 2012 Blog! - http://www.systemcentersolutions.co.uk View OpsMgr tips and tricks at http://systemcentersolutions.wordpress.com/