Private method gsub Error

Rails
1

Hi,
I keep getting this error when trying to use a condition in one of my
habtm.
I’ve used conditions in habtm before in other projects and they work
fine. Now I’m getting this:
private method `gsub’ called for [“user_id = ?”, “1”]:Array

This is what I’m doing.
has_and_belongs_to_many :TenSpeed, :class_name => “Bike”, :conditions
=>[“gears = ?”,“10”]

Any ideas why I would be getting the ‘private’ error?

Cheers,
Eric G.