Google Checkout Button Grayed Out

Hello,

I have the newest version of Zencart and the latest version of Google Checkout installed. I seem to be having an issue with the Google Checkout. I can see the button during the checkout process, but it is greyed out, and underneath says "Not available for these items" (which is whatever item I try and add to the cart to checkout, as if I was a customer). It also says in red directly underneath it "There are multiple shipping options selected and they use different shipping tax tables or some dont use tax tables".

I have a table method (for flat rate shipping) set up, and the USPS shipping module set up, but I'm confused as to why the GC button is greyed out and not allowing a checkout through Google?

Any solutions to fix the issue sure would be appreciate.

www.photofoldz.com

Scott

Got the problem fixed, it was a "Tax Class" issue with the shipping. I went ahead and fixed that, made sure their was no tax on the each of the shipping modules.

Now though, I have another issue. In the GC page, there is a "Free Options - $0.00" shipping option, along with the normal shipping that i have setup, which is a Flat Rate Table (for USPS First Class Mail), Store Pickup (for $0). But, the USPS Priority and USPS First Class shipping is coming up for $1?

How can I resolve this?