One of my colleagues had an issue accessing the Screen Layout designer in the AX Client and I was a bit confused… it worked for me… This turned out to be two separate issues.
The first one was that he and I was logged into two different AOSes and the Retail Headquarter was not installed on the one he was logged on to… simple enough to fix… I simply installed it. The Retail Headquarter component includes some DLLS that are required. If you want to be able to run the Retail Layout Designer on a client or terminal server you will need to install the retail components on the client/terminal server as well.
When we installed the Headquarter components we unfortunately missed the fact the we “probably should” install Expression Blend 
(note to self… read all the instructions)
When we tried to start the Designer it crashed with this error.
I found information on this issue on LCS Issue Search (Link below). The trick is to install Expression Blend Dev Kit for .NET and then copy Microsoft.Expression.Interactions.dll and System.Windows.Interactivity.dll from “C:\Program Files (x86)\Microsoft SDKs\Expression\Blend\.NETFramework\v4.0\Libraries” to “C:\Program Files (x86)\Microsoft Dynamics AX\60\Client\Bin”
When these issues was fixed and my colleague tried to start the Button Grid Layout he gets this error:
Normally the AX AOS Service user is used to access the AX database but in some cases the individual user needs to have specific access… below is a link to an article that describes steps involved
http://daxdude.blogspot.se/2013/02/ax-issue-method-start-in-com-object-of.html
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