i am having problems to save a request

i want to save this data in a request

<typ:limitVoice></typ:limitVoice>

then i save the project correctly by the option file / save all projects, i close the step and finally I open the same test step by double-click but the changes I made in the labels are not shown

<typ:limitVoice><typ:enabled/></typ:limitVoice>

to reopen the step label appears again <typ:enabled/>

What am I doing wrong?

thank you very much.