[NTG-context] numbering problem

The following problem in the numbering of equations, figures, tables has arisen. For the subdivison of the document is wanted the numbering scheme chapter (numbered) section (numbered) subsection (numbered} subsubsection (not numbered) Doing this with \setuphead[subsubsection][number=no], because I find 3 levels of numbering enough. However, the number=no on the last \setuphead has as sideeffect that the chapternumber is missing on equations, figures, tables. Thus for example instead of "table 1.4" I am seeing "Table 4". How can I keep the numbering at 3 levels instead of 4 in still have tables inside subsubsections numbered as "Table 1.4"? Hans van der Meer