hi all, i have been cooking cakes (out of a box) for a very long time now and i have never had this problem before. we replaced our oven within the last year,( elec) and i have cooked maybe 10 or 15 cakes in it and everyone of them maybe rise 3 inches, some maybe 4. i have called the manufacture at least 4 times with NO help. the oven is a name brand and i have checked the temp. it is right. i have also tried both metal and glass cake pans. any help please.