Help! Uninstalled mysql5 and installed 4 but it won't let me config a password!

I had mySQL 5 installed on my server but it was not compatible with the scripts I am running so I uninstalled it using windows add remove programs.

So I installed mySQL 4 and it was able to install it and start the service however it would not let me configure a password for it. It says something about an old password already existing but when I try and log in with my old password which is definatly correct it doesn't let me.

Does anyone know how I can remove all instances of this "old" password so I can create a new one and log into the service?

Help greatly appreciated.

 

 

 

 

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