Digital BW, The Print

Hallo everybody,
I'm new on this group and hope you'll help me to start with B&W printing (which I also need to create digital negatives).
Yesterday I bought R300 printer with some cheap third party cartridges.
I printed Ink Separation Test Page from QTR and it was printed in grayscale only. I read QTR User Guide by Tom Moore, but I can not figure out where I do mistake. 
Second question is about black dye ink mixing. Where can I find some hints (like base mixing or dilution ratio) for 2, 3, or 4-tone black inks?

Best regards,
Marek