"incompatible" apps through google play market

Just a quick one here, I've recently installed gingerbread to my HD2 using cyanogenmod 7, previous to this I was running froyo through a different mod. My problem is this, many of the market apps that ran fine on my phone before are now listed as incompatible and Google play refuses to let me download them. I know that they are compatible, because like I said, I ran them perfectly well on my froyo mod. Is there a way around this problem?