Zerog is correct. You will need to reload your OS. Since he is on WAP, I will post the links he is referring to.
How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ
If you have issues there, try :
What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ
That should leave your device with a 507 error, meaning no operating system installed.
Once you get that screen,
How do I upgrade the OS on my BlackBerry? - BlackBerryFAQ
Good luck!