Password starts with @ generates an error if run as webservice

[ing4prg]

My password starts with @, it is like @MyPass.
Everything runs well if I start gitblit.cmd.
But if I run the Gitblit as a webservice, it starts, then stops. From log files I see this:

Password verification failed
No such file: mypass (this is the rest of my password without @).

Any help?
Thanks