I have the same problem. I'm using elgg 1.7.7 and arvixe.
And so, I have the next error in some plugins in the river (Elgg couldn't connect to the database using the given credentials)
I check the database and is ok, the engine/settings.php is fine.
@Evan Winslow, thanks, already with your post.
@rjcalifornia, Gracias!!
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