Macbook Pro is Not Booting After RAM Upgrade

Hi,
I just upgraded the RAM in my MacBook Pro running Mountain Lion from 4gb to 8gb (Using the memory that the guy at Fry's recommended). It has been stuck on the Apple logo for about 20 minutes after the upgrade, even after I made sure that the RAM was seated properly. Is it normal for it to take this long to boot after a RAM upgrade?

I installed 8gb (2 X4gb) and it has a maximum of 8gb. I have determined that it was just bad RAM, so I will return it as soon as I can.
Thanks.

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