OK, I found the problem,, my .csv data was in reverse order. To find it, I read the t6 file using the T6 struct, printed the internal data, and the problem appeared:

typedef struct T6
{
DATE time; // timestamp of the end of the tick in UTC, OLE date/time format
float fHigh,fLow;
float fOpen,fClose;
float fVal,fVol; // additional data, like ask-bid spread, volume etc.
} T6;