Welcome to the forum.
Rather than hijack an old and (apparently) abandoned thread, it's better to start a new one of your own, giving full details of your actual setup, what you are actually seeing, and what you have tried so far to resolve it.
Please see How to write your question to maximize your chances to find a solution
Your post has now been split to this separate thread, so you can provide the full details in a reply here.
For ST-Link connection issues, see:
How to solve connection errors when connecting and programming the STM32 target board.
How to solve debugger connection issues
If you are trying to use the ST-Link on a Discovery board, see this.
A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.
