Error 1045 While installing Zenoss 4.2.4

Hello All,

I am trying to install Zenoss 4.2.4, and I am receiving the following error message:

Fresh install pre steps

Checking RRDtool version >=1.4.7: [ OK ] 1.4.7

Error 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

Dropping database: zodb_session

Failed to create ZODB session database

Can someone tell me what i need to do to fix this issue? I have removed MySQL and Zenoss completely from my server and tried to reinstall and still get this messgae.

My Operating system is CentOS 6.5

Thanks,