2nd problem! : MySQL detected, yet couldn't connect!? - Joomla! Forum - community, help and support

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dear all,
my joomla files , mysql server reside on same server
thus when installing joomla, on first step/page,
it says mysql detected, , other settings ok (greens, no red)  8)

however when got step nid fill db information, , submit info
it says wrong password or username (or sumthing dat)

which strange since able connect command prompt , mysql client (im using navicat mysql) w/ same username , password , host.
and im pretty sure db host "localhost", same computer run joomla.  ???

any possible mistake miss?
thanks ur help  :-[

firewall settings, maybe?





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