I am here again

Problem is, when create dataset, and then realise Browsefilter, , when browse table, everything is correct filtered, but :
1. cannot skip row down
2. when scroll with mouse scroll up, then browsing same rows x times.
Where can be problem ?
When filter data via SELECT statement, then browsing is OK.
When problem is not with DCBROWSE, then I thing some problem with SQL processing records (maybe forward only cursor or I do not know what.)