Mice are not breeding...

[Pareeeee]

I am trying to get my mouse breeding operation going. My problem is that they are not breeding. I bought one male and five females from two different pet stores over a month ago, and no babies yet. (think I'm gonna feed off a couple females, I think I went a little overboard on their numbers...when they do start breeding I think I'll have wayy too many babies)

Anyway, they all get along great, the females accepted the male very quickly. He has not been attacked by any of the other mice and is still in-tact (not castrated!). I feed them a seed mixture diet, I also give them treats of coconut, oats and rice. They always have disposable hides (mac 'n' cheese boxes, toilet paper tubes, etc) and pieces of paper for them to rip up. There is good ventilation, they have plenty of room and they are in a medium to low traffic area of our apartment. I clean their tub regularly.

Any advice?

PS: Here are pics of the enclosure.