And I would encourage you to get the Tri-Flow spray, as I have found that solves many problems like this one. Also, first clean off all that oil; too much oil can cause problems, too. It was sewing machine oil, right? 3-in-1 oil would CAUSE that problem and other substances, such as WD40, might cause that problem. It makes the parts sticky.
Get Tri-flow on e-bay or at a bicycle shop.