Acrobat X Standard - Add text in Form W-2

I got the new laptop computer and downloaded Acrobat X Standard from the serial number.

It was successful and I downloaded the Form W-2 from IRS website and add text init.

I can put the numbers and Employee's name but I can't add text in Employer's namd and Employee's address boxes.

When I click "Add or Edit Text Box", the cursor has "A" and when I click where I want to type, there is a short vertical line appears and I can type, but when I do the same thing and click where I would like to text Employer's name and address, the "A" cursor disappears and I can see the short vertical line on the very left down corner of that box.

Is there any restriction because that form is from IRS?  I can type something else such as wages and Employees SSN and names.  Please see attached. I added some fake numbers and name it it.  

I called the call center but she said the support of Acrobat X Standard is ended so go to forum and ask experts.

Can anyone help me on this issue?