[bhuterbap]

my bb is curve 8900. i got a prob with rebooting. in white screen only told " app error 200" what can i do now?. i tried to connect my bb with bb desktop soft. but not worked.

[devnull]

There are many google search hits on "app error 200" with solutions. Here is one of them.

App error 200 - BlackBerry Support Community Forums

[Dubdub]

If none of the suggestions int he posted thread work out, wipe the device with Jl_cmder (see the FAQ for more information) and then reload your OS (yellow sticky at the top of the 8900 section for OS and instructions)