It might be worth at this stage having a word with your LANDESK partner (if you have one) or going through LANDESK support. There is either a niggly configuration issue that just isn't visible to you right now or there is a problem. I would look to do a remote session at this point to walk through it with you.
Mark McGinn
MarXtar Ltd/MarXtar Corporation
http://landeskone.marxtar.co.uk
LANDESK One Development Partner
The One-Stop Shop for LANDESK Enhancements