Can not read text of two textfields

[bstar77]

I'm trying to read the text of two textfields.

`NameProperty := "Vorname"
condition1 := uia.CreatePropertyCondition(UIA_NamePropertyId, NameProperty, VT_BSTR)

mycontrol := crm_window.FindFirst(condition1, TreeScope_Descendants)
str1 := mycontrol.GetCurrentPropertyValue(UIA_ValueValuePropertyId)

NameProperty := "Kundennr."
condition2 := uia.CreatePropertyCondition(UIA_NamePropertyId, NameProperty, VT_BSTR)

mycontrol := crm_window.FindFirst(condition2, TreeScope_Descendants)
str2 := mycontrol.GetCurrentPropertyValue(UIA_ValueValuePropertyId)`

str1 gives me the text of control 1.

Second request does not work. str2 would be empty in the code above. What could be the problem?