can't connect to mysql from a different host

[tiinu murjam]

Hi everibody, I am facing a connecting trouble.

Here is the discription of the situation:
I have running mysql server on my pc. I can connect to mysql on that pc, create databases ect. So the thing is working and everything is OK, but....
The problem is, that I cannot connect to the mysql on my pc from another pc. In the user table I have such user, that can connect from any host and also a user that theoretically can connect from scpecified hosts, but none of them can really do it.

It looks like that:

>mysql\bin\mysql -h myhost -u theuser -p
enter password: **********

>ERROR 2003: is not allowed to connect to host 'myhost' (10060)

or it gives sometimes

>ERROR 2013: lost connection during the query.....

and I am sure that this syntax is correct, i mean it works on other pc's.

PLEASE HELP ME!

What may be wrong?
How to get access to the databases and tables (how to get the connection first;)) to mysql from not local pc? How to do it properly? What van be wrong in configuration?