Android Question Problem with Edit Text

Hi guys,

I have a problem with Edit Text, I don't know what to called this problem.

Here is the problem :
- I have a few Edit Text, for ex 5 Edit Text
- On Edit Text 1-3, when virtual keyboard displayed, there is a Next Button on the virtual keyboard
- But On Edit Text 4, no Next Button on the virtual keyboard, instead Done Button displayed. I have select Forced Done to False on Edit Text 4 to forced Next Button shows up, but no avail.
How to fix this ?

Thanks in advance.