TFS 2010 to 2013 Migration - Issue with XAML templage

Hello,

I'm trying to use new TFS 2013 with the XAML custom templates used with TFS2010. It's working fine with TFS 2010 but I'm trying to use it with TFS 2013 build server it's not allowing me to select "Projects to build" and giving following error/warning.

Object of type 'Microsoft.TeamFoundation.Build.Workflow.Activities.StringList' cannot be converted to type 'Microsoft.TeamFoundation.Build.Workflow.Activities.StringList'.

I've removed all assembly references with 10.0 from XAML template but not working, any idea?

Thanks in advance.