If .Visible is what raises the error, there is something deeper going on. First I'd suggest copying code and pasting in between code tags (use # button on posting toolbar). Don't type it in here for various reasons. Or I'd remove the control, save and close the form and then add the control back again in design view, save, close and reopen.
EDIT
So when it says it cannot find the control, it is telling the truth.
Except the message is about not finding the object OR recognizing a method of the object that it can find.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.