How are you trying to get into download mode? What works for me is this:

Turn phone off and leave it off. Plug USB cable into phone but not computer. Hold both VOL buttons down. Plug USB cable into computer.

Where is the SDK installed you your phone? You need to use the command prompt on the computer to get to the directory with ADB. Example: cd\ C:\android-sdk-windows\tools.

Once in that directory you can use ADB. However, if Debugging is not turned on on the phone you won't be able to use ADB.

Try getting into download mode the way I described and come back with more information if you can.

 

I used to always have an issue with download mode here is my 100 percent download mode

take battery out
Hold down volume buttons
plug phone in
slide battery in

works everytime!!

 

I've never had to take out the battery, but I've read many posts saying that way works as well.

 

hit this link it has down load links for the software needed and is the very best way i know to unbrick a hard bricked vibrant

[GUIDE] How to Restore or Recover Your Samsung Vibrant : AndroidSPIN | Your No.1 source for Everything Android.


oh btw you should try fusion 1.1 its sick heres a ss of my home screen

 

Uh...looks like you've got quite a bit of mail to read...

 

Rofl.

 

Would drive me insane to have an inbox that full of unread mail

 

LOL, I'll bet you anything 3074 of them are spam...