grant all won't grant global privileges

[Paul webber]

I'm running mysql on Linux, version 4.0.24_Debian-10-log.

At the mysql prompt I do:
mysql> grant all on *.* to 'root'@'192.%.%.%';
Query OK, 0 rows affected (0.00 sec)

This should (I think) grant all access to ALL databases, not just the current one. But it only grants access to the current one. On my other pc, which is also on the 192. network, I do a show databases. I only see the database that was currently selected on the mysql server. If on the server I do a 'use database2', then run the same grant command, now database2 shows up on the client. So the above grant statement is only granting access to the currently used database. How do I grant access to ALL databases on the server. According to the docs, it seems this should work.

Thanks