Problem with Union in 5.0

The InfoTableFunctions.Union service is not working for us in 5.0. Below is some sample code.

var params1 = {
infoTableName : "InfoTable",
dataShapeName : "LWShareType"
};

// CreateInfoTableFromDataShape(infoTableName:STRING("InfoTable"), dataShapeName:STRING):INFOTABLE(LWShareType)
var result1 = Resources["InfoTableFunctions"].CreateInfoTableFromDataShape(params1);

result1.AddRow({"Name":"name1","Value":"value1"});
result1.AddRow({"Name":"name2","Value":"value2"});
result1.AddRow({"Name":"name3","Value":"value3"});

var params2 = {
infoTableName : "InfoTable",
dataShapeName : "LWShareType"
};

// CreateInfoTableFromDataShape(infoTableName:STRING("InfoTable"), dataShapeName:STRING):INFOTABLE(LWShareType)
var result2 = Resources["InfoTableFunctions"].CreateInfoTableFromDataShape(params2);

result2.AddRow({"Name":"name4","Value":"value4"});
result2.AddRow({"Name":"name5","Value":"value5"});
result2.AddRow({"Name":"name6","Value":"value6"});

var params = {

t2: result2 /* INFOTABLE /,<br> t1: result1/ INFOTABLE */
};

// result: INFOTABLE
var result = Resources["InfoTableFunctions"].Union(params);