I tried to download a theme to my 8700 though the browser, i use the OTA download. and after download is finished i have an hour glass spinning constantly. i rmoved battery, SIM card, used the JL_CMDER all , options but my BB is not connecting to my PC anymore as it keeps restarting and showing the spinning hour glass all the time.
Please tell me what to do, I'm going creazy....

I suggest you read here:
What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ

Good luck! And, welcome to the BBforums.