Since you said you wanted to go back to the official 2.17 ROM, which is probably a very good idea, you do NOT want the Olipro 2.4 bootloader, as it will not work with the 2.17 ROM. You want to flash the relocker, then the 2.17 ROM.

If you do not have the Relocker, get it here:
ftp://ppcgeeks:ezupload@ftp.ppcgeeks...n_Relocker.exe

1. Plug the USB cable into the phone.

2. Hold in the Power and Camera buttons, while you push the stylus into the Reset hole. You should see a colorful Bootloader screen.

3. Run the Relocker program on your PC.

4. Follow any instructions on the PC or phone.

5. When it finishes, run the official 2.17 ROM upgrade that you downloaded from the HTC site.

6. Follow any instructions on the PC or phone.

7. When it is finished, do an extra hard reset.

8. Reload your programs and resync to get your data back.

9. Leave the other upgrades alone until you are more familiar with the phone and these procedures, or when more official upgrades are released.

I'm in bootloader now, but when i try to run Relocker it's saying "No Device Connected" "Would you like to try copying again?"
What I'm doing wrong?
Help please!

Thanks for helping me so guys!
Keep going to tell me, if it's not hard for you guys...
I just need to repair my Mogul.

Relocker saying that "No Device Connected" "Would you like to try copying again?"
What do i need to do now?
Help!

What level bootloader is showing on your screen?

TITA100
SPL-1.04.0000

If i plug usb cable it's changes from Serial to USB

You should be able to load up an official ROM from Sprint.

Download: http://www.america.htc.com/mogulupdate


-Virtualboy

Should this ROM work fine,do i need to flash something else?

Where can i download Olipro 2.4 bootloader?
Please give a link.
And how to install new bootloader if i can't boot my device?

With that bootloader, you should flash the 2.17 ROM from the HTC site and you should be up and running again