Weird mysql problem

i was at my customers place to update his software
i copied files and when run new exe it give error "can not connect to mysql "
so then again i deleted this new updated file and run old exe
which was again working fine

what to do
every thing was same
but new didn’t run
old was running perfectly

Did you check that the new EXE is configured properly to start the MySQL server?
And when you placed the new software files, did you keep the “mysql” folder with all of the MySQL data and bin files?

everything was perfect
because same exe was running perfectly in my pc

i guess mysql has too many issues as it runs on server
so i am trying to migrate to sqlite3

but now problem is encryption

i hope you will give us a solution soon …