Why is my ecu playing hard to get?

[JJtheHITMAN]

Iv bought a kwp2000+, managed to install all the drivers, after i run the software and identified the ecu giving me all its series numbers i then click the read button and it askes me where to save it, i select an empty folder in c: and it either wont read it wont save, it says waking ecu...... Then a few seconds later says "internal hardware error". Iv tried everything, just cant seam to get it to work. Really starting to give up now. Anyone had this problem before