hope somebodoy can help me, I had had my curve for a week but today i was using it when the bb reset itself, since then my bb does not start, the sand clock stays in the screen for a couple of seconds and then it restars again.

I tried pulliang out the battery and also alt + shift + delete

How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ

What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ

You'll need to reinstall the OS. Most likely JL_Cmder will not connect with the device so you might just start with the second link.

If that keeps repeating you need to reload the operating system.

Dear John and Doug,
you were right the first link does not work, I tried the second one
I download the OS software but it is an installer, from the link, and I run it (its a .exe installer)
but then on the AppLoader did not find any *.alx or *.ali files to add