This is actually from the bb support site:
The BlackBerry device has an hourglass on the screen, and eventually displays the following error message: Error 561
In this case, Error 561 may actually be Error 507. On some BlackBerry device models, the 0 and the 7 together appear as a "squished" 61. To determine if this is the case, check to see if the circle of the 6 has a slash through it. A normal number 6 does not have this, but a 0 does.
In any case Error 507: A dependency on a COD file could not be satisfied because the COD file is missing. Translated meaning the OS is corrupt.
The fix is to reload the OS. How do I upgrade the OS on my BlackBerry? - BlackBerryFAQ
You may need to wipe it first: How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ