Hardcore problem

Hi Everyone
I just got Hardcore Software Guitar Pedals it's an awesome product. I am using an Intel iMac core duo 2.8 with 4 gig ram and Logic Pro 8. I am using Snow Leopard which could be my problem but when I want to add pedals to a guitar track in mono it crashes Logic. But when I add to a stereo track it's fine. Any ideas? Is there an update available? Thank you in advance Johnmac8

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