Using Test Execute 11 in Visual Studio 2015 Professional

I'm trying to use TestExecute 11 in Vusial Studio 2015 Professional to test as connected application.
But written tests in Visual Studio 2012 cannot be compiled.
There are a lot of errors like:
Cannot convert type 'AutomatedQA.script.var.VarDelegate' to 'string'
Cannot convert type 'AutomatedQA.script.var.VarDelegate' to 'bool'
....