Problem getting phpMyAdmin to work on localhost

I have a couple of problems with newish MySQL database. I am running WinXP-Pro, MySQL V 4.0.12-nt, Apache etc. I previously got this all working, but today (after a break of a couple of weeks) I can't get "phpMyAdmin-2.5.0-rc1" to work. I have configured {config.inc.php} exactly as per documentation, but when I try to run the {index.php} file in IE6, I get a pause (nothing new displayed) and then the address bar reverts to the currently displayed page. (ie the page displayed in IE just before I tried {index.php}) I don't see any errors??? Is this a known/common problem, with a solution? If not, how can I find out what the problem is? ** Please also see my Notes below. ** NOTES: 1. I have a web site, with MySQL and I can run that copy of phpMyAdmin 2. I do have PHP working *locally* in IE ok. 3. I do have MySQL working and can administer is from the windows program MySQL Control Center v0.9.1.