my meat packing building wont work

anyone else having this problem it gets built but wont actually do the job any ideas?

Only thing I can think of is that if you have the mouse over the item when it becomes available it won't click - true for buildings and upgrade buttons - you have to move the mouse off the item, then back on again and click to get it to work.

sent out the plain and buy white trays; you need these to pack the meet.