Sounds like you could do with joining us on irc.freenode.net channel #tikiwiki for some support. Seems that your database is talking ok
What version of Tiki are you installing? It could be a permission problem maybe with the Smarty engine attempting to write out its cache files, (they goto templates_c and modules/cache)
I think the best thing is to join us on irc. and hopefully someone can sort you out in there.