1. Why when the flash programming is corrupted I can't go again into the Flash bootloader ?

2. Is there a way to repair this ?
1) As to why and how to avoid this problem see my user page <---
2) Yes, with a parrallel programmer.

Note: the measures described in the 2nd article on my user page MUST be implemented BEFORE anything happens. If not, the parrallel programer is the only way out.

Erik