There's a lot of working injectors out there.
Here's a new injector reported to work and be approved:
Syko_0's Project InjeX
And here is a good working public hack by Longevity.
Check those out. If they don't work for you, post again and we'll find something.
Also, if you get any errors, try to take screenshots of them or post DETAILED information and exactly what error you're getting so we can solve your problem faster.