Dremmel Help? I have a brand up to date dremmel tool with adjectives kinds...

I have a brand up to date dremmel tool with adjectives kinds of cool stuff. I want to drill holes contained by glass next to it. I have a diamond bit specifically suposed to be for glass but it isn't even scratch it. What am I doing wrong? Any advice as far a exactly what bit for drilling through gelatinous glass.
Putting up crown moulding?
Answers:    i dont know but i would start the bit slow and push complicated but nit to hard to break chalice. if its starts cutting spead it up for a while dont go pased 1/2 track with the speed.
What style of nail should walk contained by...
Like the other post ,said in that should be a variable speed set on in that where you move a dial anywhere from #1 to # 8 freshly start in a slower setting and apply alittle pressure on it untill it sinks surrounded by then slowly turn up the dial and apply more pressure...only make sure you agree to the tool do the work.Also check the link below those are the cup bits im familar with, they look approaching a spear head.Just to trademark sure your using the correct ones.