Associating WorkStations to Requestors

Hi,
I am still in the learning phase of Service Desk setup, I have imported users from AD, when I go into the Admin - Requestors and click on the user the configuration brings up the users details etc, there is a button marked Associate Workstation. Clicking on this brings two boxes up i.e. all the assets available and assets assigned.

So I find the asset tag and move to right hand box, click Save and close that window, I save the User details for good measure then go back into the user and Associate Workstation , only to find the associate assets contains five completely unrelated assets.

And no matter which user I chose, I get the same five assets. I have also tried assigning the user through the Assets screen, but when I go back to requestor it shows the same five assets.

Anyone got any ideas?

Service desk is: 7.5.0 Build 7506
O/S: Windows Server 2003

I can post screen shots if it helps you.

Thanks

Stephen Lewis