Ok if you want someone to connect to your database. This is only for Nacivate.
1. You will need the person Ip address
2. Open up Navicate
3. Connect to your database you wish them to have access to (example it might says localhost)
4. Go to manage users
5. Go to add users
User Name - Put what you want here
Host - put the person Ip address in here
Password - put what you want here
confirm password - same as the one above
6. Hit ok
7. Find the username from the list to the left and give them access to all or what you want them to have
OK THIS PART IF FOR THE PERSON TRING OT CONNECT TO YOUR DATABASE
1. Open navicate
2. Click on connections
Connection Name - you can leave this blank if you want
Host name/IP address - put in the ip of the server your tring to connect to
Username - put in the username they made for you ( will be the same one as Line 5. from above you made.)
Password - put in the password they made for you ( will be the same one as Line 5. from above you made.)
3. Hit Test connection If everything done correctly it should say connect successful.
If you still cant get it working add me to msn

i will help in anyways i can.