In Pega Robotic Architect Essentials Course, I have issue while doing lab in Lesson: Working with match rules Exercise: Using Attribute Value match rule

1 In the Solution Explorer, double click ACMESearchSystem.os to open it in a designer window.
2 On the designer tab, click Start Interrogation. The web application launches and the Login page appears.
3 In Object Explorer, select ACMEtxtUserName. As seen in the Match Rules frame on the designer window, the control uses the Input Type and Element ID match rules.
4 From the combo box below the Match Rule frame, select Attribute Value Match Rule
5 Click New. The match rule displays in the frame and all match rule green check marks are now orange question marks
6 Bring the browser back to the active window using the Taskbar. In the browser, right-click on the web page and select View Source. A separate window displays with the color-coded HTML.
7 Scroll through the code until line 286. (It may be a different line number depending on your browser settings. An input tag displays indicating the user_name. This is the user name field on the web page
8 In Object Explorer, select the ACMEtxtUserName web control to highlight again.
9 From the Match Rule drop-down box, select the Attribute Value Match Rule
10 In the Design window, in the Selected Match Rule frame , click the Attribute property and enter name. This is the attribute in the HTML code
11 In the Design window, in the Selected Match Rule frame, click the Text property. An ellipses button displays
12 Click the ellipses button. The Match Rule Editor window displays.
In the Match Rule editor window, in the Text field, enter user_name. This is the value of the name attribute
13 Click OK to close the window.
14 In the Design window, click the Refresh matching button. The matching green check mark is not appears

Thanks in Advance......

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