I'm going to assume you are using 1.11 since you say it's stable.
Some basic questions:
What is your connection speed?
How many files have you tried downloading?
How many hosts had the file(s) you are basing the speed of XoloX on? (What was the score of the file(s) you downloaded?)
Are you surfing the internet, downloading, streaming music/video, etc. at the same time as you are running XoloX?