[NTG-context] Repeating tabulate head/tail on every page

Hello, I have a long tabulate which spans several pages. I use: \starttabulatehead \HL \NC Energy \NC Temp. \NC Magn. \NC Wavenumb. \NC Wavelength \NC Freq. \NC Energy \NC Energy \NC\NR \HL \stoptabulatehead \starttabulatetail \HL \stoptabulatetail but this only shows the head/tail of the table at the very beginning and very end of the table. (Every row spans only a single line.) Tobias